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Finding the Fourth Proportional to 638,057.40, 880,487.40 and 351,531.24

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Solution

The fourth proportional to 638,057.40, 880,487.40 and 351,531.24 is: 485,095.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,057.40 : 880,487.40 = 351,531.24 : x
  2. Step 2: Convert to fraction form
    638,057.40/880,487.40 = 351,531.24/x
  3. Step 3: Cross multiply
    638,057.40x = 880,487.40 × 351,531.24
  4. Step 4: Simplify right side
    638,057.40x = 309,518,827,526.38
  5. Step 5: Solve for x
    x = 309,518,827,526.38/638,057.40
  6. Step 6: Final answer
    x = 485,095.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.