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Finding the Fourth Proportional to 642.96, 962.60 and 591.92

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Solution

The fourth proportional to 642.96, 962.60 and 591.92 is: 886.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.96 : 962.60 = 591.92 : x
  2. Step 2: Convert to fraction form
    642.96/962.60 = 591.92/x
  3. Step 3: Cross multiply
    642.96x = 962.60 × 591.92
  4. Step 4: Simplify right side
    642.96x = 569,782.19
  5. Step 5: Solve for x
    x = 569,782.19/642.96
  6. Step 6: Final answer
    x = 886.19

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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.