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Finding the Fourth Proportional to 614.79, 920.77 and 397.71

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Solution

The fourth proportional to 614.79, 920.77 and 397.71 is: 595.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.79 : 920.77 = 397.71 : x
  2. Step 2: Convert to fraction form
    614.79/920.77 = 397.71/x
  3. Step 3: Cross multiply
    614.79x = 920.77 × 397.71
  4. Step 4: Simplify right side
    614.79x = 366,198.44
  5. Step 5: Solve for x
    x = 366,198.44/614.79
  6. Step 6: Final answer
    x = 595.65

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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.