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Finding the Fourth Proportional to 315,356.64, 435,188.76 and 172,115.52

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Solution

The fourth proportional to 315,356.64, 435,188.76 and 172,115.52 is: 237,517.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,356.64 : 435,188.76 = 172,115.52 : x
  2. Step 2: Convert to fraction form
    315,356.64/435,188.76 = 172,115.52/x
  3. Step 3: Cross multiply
    315,356.64x = 435,188.76 × 172,115.52
  4. Step 4: Simplify right side
    315,356.64x = 74,902,739,725.56
  5. Step 5: Solve for x
    x = 74,902,739,725.56/315,356.64
  6. Step 6: Final answer
    x = 237,517.56

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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.