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Finding the Fourth Proportional to 669.60, 999.38 and 625.86

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Solution

The fourth proportional to 669.60, 999.38 and 625.86 is: 934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.60 : 999.38 = 625.86 : x
  2. Step 2: Convert to fraction form
    669.60/999.38 = 625.86/x
  3. Step 3: Cross multiply
    669.60x = 999.38 × 625.86
  4. Step 4: Simplify right side
    669.60x = 625,471.97
  5. Step 5: Solve for x
    x = 625,471.97/669.60
  6. Step 6: Final answer
    x = 934.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.