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Finding the Fourth Proportional to 588.78, 811.85 and 402.36

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Solution

The fourth proportional to 588.78, 811.85 and 402.36 is: 554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.78 : 811.85 = 402.36 : x
  2. Step 2: Convert to fraction form
    588.78/811.85 = 402.36/x
  3. Step 3: Cross multiply
    588.78x = 811.85 × 402.36
  4. Step 4: Simplify right side
    588.78x = 326,653.95
  5. Step 5: Solve for x
    x = 326,653.95/588.78
  6. Step 6: Final answer
    x = 554.80

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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.