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Finding the Fourth Proportional to 1,666.38, 2,499.62 and 626.27

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Solution

The fourth proportional to 1,666.38, 2,499.62 and 626.27 is: 939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.38 : 2,499.62 = 626.27 : x
  2. Step 2: Convert to fraction form
    1,666.38/2,499.62 = 626.27/x
  3. Step 3: Cross multiply
    1,666.38x = 2,499.62 × 626.27
  4. Step 4: Simplify right side
    1,666.38x = 1,565,432.33
  5. Step 5: Solve for x
    x = 1,565,432.33/1,666.38
  6. Step 6: Final answer
    x = 939.42

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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.