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Finding the Fourth Proportional to 431,193.60, 645,561.60 and 418,905.60

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Solution

The fourth proportional to 431,193.60, 645,561.60 and 418,905.60 is: 627,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,193.60 : 645,561.60 = 418,905.60 : x
  2. Step 2: Convert to fraction form
    431,193.60/645,561.60 = 418,905.60/x
  3. Step 3: Cross multiply
    431,193.60x = 645,561.60 × 418,905.60
  4. Step 4: Simplify right side
    431,193.60x = 270,429,369,384.96
  5. Step 5: Solve for x
    x = 270,429,369,384.96/431,193.60
  6. Step 6: Final answer
    x = 627,164.62

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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.