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Finding the Fourth Proportional to 588.47, 811.85 and 378.61

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Solution

The fourth proportional to 588.47, 811.85 and 378.61 is: 522.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.47 : 811.85 = 378.61 : x
  2. Step 2: Convert to fraction form
    588.47/811.85 = 378.61/x
  3. Step 3: Cross multiply
    588.47x = 811.85 × 378.61
  4. Step 4: Simplify right side
    588.47x = 307,374.53
  5. Step 5: Solve for x
    x = 307,374.53/588.47
  6. Step 6: Final answer
    x = 522.33

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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.