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Finding the Fourth Proportional to 315,547.24, 435,472.90 and 172,320.60

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Solution

The fourth proportional to 315,547.24, 435,472.90 and 172,320.60 is: 237,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,547.24 : 435,472.90 = 172,320.60 : x
  2. Step 2: Convert to fraction form
    315,547.24/435,472.90 = 172,320.60/x
  3. Step 3: Cross multiply
    315,547.24x = 435,472.90 × 172,320.60
  4. Step 4: Simplify right side
    315,547.24x = 75,040,951,411.74
  5. Step 5: Solve for x
    x = 75,040,951,411.74/315,547.24
  6. Step 6: Final answer
    x = 237,812.10

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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.