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Finding the Fourth Proportional to 667.32, 1,001.62 and 625.40

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Solution

The fourth proportional to 667.32, 1,001.62 and 625.40 is: 938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.32 : 1,001.62 = 625.40 : x
  2. Step 2: Convert to fraction form
    667.32/1,001.62 = 625.40/x
  3. Step 3: Cross multiply
    667.32x = 1,001.62 × 625.40
  4. Step 4: Simplify right side
    667.32x = 626,413.15
  5. Step 5: Solve for x
    x = 626,413.15/667.32
  6. Step 6: Final answer
    x = 938.70

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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.