Home / 990,200.10-1,485,300.15-421,434.30

Finding the Fourth Proportional to 990,200.10, 1,485,300.15 and 421,434.30

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Solution

The fourth proportional to 990,200.10, 1,485,300.15 and 421,434.30 is: 632,151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,200.10 : 1,485,300.15 = 421,434.30 : x
  2. Step 2: Convert to fraction form
    990,200.10/1,485,300.15 = 421,434.30/x
  3. Step 3: Cross multiply
    990,200.10x = 1,485,300.15 × 421,434.30
  4. Step 4: Simplify right side
    990,200.10x = 625,956,429,005.15
  5. Step 5: Solve for x
    x = 625,956,429,005.15/990,200.10
  6. Step 6: Final answer
    x = 632,151.45

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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.