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Finding the Fourth Proportional to 591.13, 887.10 and 385.20

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Solution

The fourth proportional to 591.13, 887.10 and 385.20 is: 578.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.13 : 887.10 = 385.20 : x
  2. Step 2: Convert to fraction form
    591.13/887.10 = 385.20/x
  3. Step 3: Cross multiply
    591.13x = 887.10 × 385.20
  4. Step 4: Simplify right side
    591.13x = 341,710.92
  5. Step 5: Solve for x
    x = 341,710.92/591.13
  6. Step 6: Final answer
    x = 578.06

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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.