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Finding the Fourth Proportional to 315,762.62, 435,758.70 and 172,531.55

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Solution

The fourth proportional to 315,762.62, 435,758.70 and 172,531.55 is: 238,096.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,762.62 : 435,758.70 = 172,531.55 : x
  2. Step 2: Convert to fraction form
    315,762.62/435,758.70 = 172,531.55/x
  3. Step 3: Cross multiply
    315,762.62x = 435,758.70 × 172,531.55
  4. Step 4: Simplify right side
    315,762.62x = 75,182,123,936.99
  5. Step 5: Solve for x
    x = 75,182,123,936.99/315,762.62
  6. Step 6: Final answer
    x = 238,096.97

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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.