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Finding the Fourth Proportional to 642.60, 962.10 and 497.40

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Solution

The fourth proportional to 642.60, 962.10 and 497.40 is: 744.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.60 : 962.10 = 497.40 : x
  2. Step 2: Convert to fraction form
    642.60/962.10 = 497.40/x
  3. Step 3: Cross multiply
    642.60x = 962.10 × 497.40
  4. Step 4: Simplify right side
    642.60x = 478,548.54
  5. Step 5: Solve for x
    x = 478,548.54/642.60
  6. Step 6: Final answer
    x = 744.71

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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.