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Finding the Fourth Proportional to 591.42, 887.49 and 386.58

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Solution

The fourth proportional to 591.42, 887.49 and 386.58 is: 580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.42 : 887.49 = 386.58 : x
  2. Step 2: Convert to fraction form
    591.42/887.49 = 386.58/x
  3. Step 3: Cross multiply
    591.42x = 887.49 × 386.58
  4. Step 4: Simplify right side
    591.42x = 343,085.88
  5. Step 5: Solve for x
    x = 343,085.88/591.42
  6. Step 6: Final answer
    x = 580.11

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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.