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Finding the Fourth Proportional to 913.87, 1,372.29 and 567.91

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Solution

The fourth proportional to 913.87, 1,372.29 and 567.91 is: 852.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.87 : 1,372.29 = 567.91 : x
  2. Step 2: Convert to fraction form
    913.87/1,372.29 = 567.91/x
  3. Step 3: Cross multiply
    913.87x = 1,372.29 × 567.91
  4. Step 4: Simplify right side
    913.87x = 779,337.21
  5. Step 5: Solve for x
    x = 779,337.21/913.87
  6. Step 6: Final answer
    x = 852.79

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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.