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Finding the Fourth Proportional to 637.39, 956.09 and 312.85

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Solution

The fourth proportional to 637.39, 956.09 and 312.85 is: 469.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.39 : 956.09 = 312.85 : x
  2. Step 2: Convert to fraction form
    637.39/956.09 = 312.85/x
  3. Step 3: Cross multiply
    637.39x = 956.09 × 312.85
  4. Step 4: Simplify right side
    637.39x = 299,112.76
  5. Step 5: Solve for x
    x = 299,112.76/637.39
  6. Step 6: Final answer
    x = 469.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.