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Finding the Fourth Proportional to 501.02, 691.17 and 314.42

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Solution

The fourth proportional to 501.02, 691.17 and 314.42 is: 433.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.02 : 691.17 = 314.42 : x
  2. Step 2: Convert to fraction form
    501.02/691.17 = 314.42/x
  3. Step 3: Cross multiply
    501.02x = 691.17 × 314.42
  4. Step 4: Simplify right side
    501.02x = 217,314.22
  5. Step 5: Solve for x
    x = 217,314.22/501.02
  6. Step 6: Final answer
    x = 433.75

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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.