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Finding the Fourth Proportional to 315,691.72, 435,684.59 and 172,473.29

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Solution

The fourth proportional to 315,691.72, 435,684.59 and 172,473.29 is: 238,029.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,691.72 : 435,684.59 = 172,473.29 : x
  2. Step 2: Convert to fraction form
    315,691.72/435,684.59 = 172,473.29/x
  3. Step 3: Cross multiply
    315,691.72x = 435,684.59 × 172,473.29
  4. Step 4: Simplify right side
    315,691.72x = 75,143,954,639.60
  5. Step 5: Solve for x
    x = 75,143,954,639.60/315,691.72
  6. Step 6: Final answer
    x = 238,029.54

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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.