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Finding the Fourth Proportional to 621.17, 920.13 and 614.26

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Solution

The fourth proportional to 621.17, 920.13 and 614.26 is: 909.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.17 : 920.13 = 614.26 : x
  2. Step 2: Convert to fraction form
    621.17/920.13 = 614.26/x
  3. Step 3: Cross multiply
    621.17x = 920.13 × 614.26
  4. Step 4: Simplify right side
    621.17x = 565,196.75
  5. Step 5: Solve for x
    x = 565,196.75/621.17
  6. Step 6: Final answer
    x = 909.89

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.