Home / 990,266,087.40-1,485,399,131.10-645,892,319.40

Finding the Fourth Proportional to 990,266,087.40, 1,485,399,131.10 and 645,892,319.40

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Solution

The fourth proportional to 990,266,087.40, 1,485,399,131.10 and 645,892,319.40 is: 968,838,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,266,087.40 : 1,485,399,131.10 = 645,892,319.40 : x
  2. Step 2: Convert to fraction form
    990,266,087.40/1,485,399,131.10 = 645,892,319.40/x
  3. Step 3: Cross multiply
    990,266,087.40x = 1,485,399,131.10 × 645,892,319.40
  4. Step 4: Simplify right side
    990,266,087.40x = 959,407,890,020,923,520
  5. Step 5: Solve for x
    x = 959,407,890,020,923,520/990,266,087.40
  6. Step 6: Final answer
    x = 968,838,479.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.