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Finding the Fourth Proportional to 315,627.20, 435,567.92 and 172,384.64

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Solution

The fourth proportional to 315,627.20, 435,567.92 and 172,384.64 is: 237,892.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,627.20 : 435,567.92 = 172,384.64 : x
  2. Step 2: Convert to fraction form
    315,627.20/435,567.92 = 172,384.64/x
  3. Step 3: Cross multiply
    315,627.20x = 435,567.92 × 172,384.64
  4. Step 4: Simplify right side
    315,627.20x = 75,085,219,084.75
  5. Step 5: Solve for x
    x = 75,085,219,084.75/315,627.20
  6. Step 6: Final answer
    x = 237,892.11

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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.