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Finding the Fourth Proportional to 660,389.20, 990,583.80 and 344,772.70

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Solution

The fourth proportional to 660,389.20, 990,583.80 and 344,772.70 is: 517,159.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,389.20 : 990,583.80 = 344,772.70 : x
  2. Step 2: Convert to fraction form
    660,389.20/990,583.80 = 344,772.70/x
  3. Step 3: Cross multiply
    660,389.20x = 990,583.80 × 344,772.70
  4. Step 4: Simplify right side
    660,389.20x = 341,526,251,302.26
  5. Step 5: Solve for x
    x = 341,526,251,302.26/660,389.20
  6. Step 6: Final answer
    x = 517,159.05

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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.