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Finding the Fourth Proportional to 507.15, 691.03 and 495.91

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Solution

The fourth proportional to 507.15, 691.03 and 495.91 is: 675.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.15 : 691.03 = 495.91 : x
  2. Step 2: Convert to fraction form
    507.15/691.03 = 495.91/x
  3. Step 3: Cross multiply
    507.15x = 691.03 × 495.91
  4. Step 4: Simplify right side
    507.15x = 342,686.21
  5. Step 5: Solve for x
    x = 342,686.21/507.15
  6. Step 6: Final answer
    x = 675.71

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.