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Finding the Fourth Proportional to 315,505.62, 435,396.06 and 172,265.76

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Solution

The fourth proportional to 315,505.62, 435,396.06 and 172,265.76 is: 237,725.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,505.62 : 435,396.06 = 172,265.76 : x
  2. Step 2: Convert to fraction form
    315,505.62/435,396.06 = 172,265.76/x
  3. Step 3: Cross multiply
    315,505.62x = 435,396.06 × 172,265.76
  4. Step 4: Simplify right side
    315,505.62x = 75,003,833,176.91
  5. Step 5: Solve for x
    x = 75,003,833,176.91/315,505.62
  6. Step 6: Final answer
    x = 237,725.82

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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.