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Finding the Fourth Proportional to 801.61, 1,105.51 and 614.77

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Solution

The fourth proportional to 801.61, 1,105.51 and 614.77 is: 847.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.61 : 1,105.51 = 614.77 : x
  2. Step 2: Convert to fraction form
    801.61/1,105.51 = 614.77/x
  3. Step 3: Cross multiply
    801.61x = 1,105.51 × 614.77
  4. Step 4: Simplify right side
    801.61x = 679,634.38
  5. Step 5: Solve for x
    x = 679,634.38/801.61
  6. Step 6: Final answer
    x = 847.84

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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.