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Finding the Fourth Proportional to 499.74, 748.47 and 316.74

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Solution

The fourth proportional to 499.74, 748.47 and 316.74 is: 474.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.74 : 748.47 = 316.74 : x
  2. Step 2: Convert to fraction form
    499.74/748.47 = 316.74/x
  3. Step 3: Cross multiply
    499.74x = 748.47 × 316.74
  4. Step 4: Simplify right side
    499.74x = 237,070.39
  5. Step 5: Solve for x
    x = 237,070.39/499.74
  6. Step 6: Final answer
    x = 474.39

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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.