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Finding the Fourth Proportional to 315,808.29, 435,810.18 and 172,565.04

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Solution

The fourth proportional to 315,808.29, 435,810.18 and 172,565.04 is: 238,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,808.29 : 435,810.18 = 172,565.04 : x
  2. Step 2: Convert to fraction form
    315,808.29/435,810.18 = 172,565.04/x
  3. Step 3: Cross multiply
    315,808.29x = 435,810.18 × 172,565.04
  4. Step 4: Simplify right side
    315,808.29x = 75,205,601,144.11
  5. Step 5: Solve for x
    x = 75,205,601,144.11/315,808.29
  6. Step 6: Final answer
    x = 238,136.88

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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.