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Finding the Fourth Proportional to 315,463.71, 435,346.20 and 172,224.30

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Solution

The fourth proportional to 315,463.71, 435,346.20 and 172,224.30 is: 237,672.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,463.71 : 435,346.20 = 172,224.30 : x
  2. Step 2: Convert to fraction form
    315,463.71/435,346.20 = 172,224.30/x
  3. Step 3: Cross multiply
    315,463.71x = 435,346.20 × 172,224.30
  4. Step 4: Simplify right side
    315,463.71x = 74,977,194,552.66
  5. Step 5: Solve for x
    x = 74,977,194,552.66/315,463.71
  6. Step 6: Final answer
    x = 237,672.96

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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.