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Finding the Fourth Proportional to 1,691.64, 2,539.06 and 922.68

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Solution

The fourth proportional to 1,691.64, 2,539.06 and 922.68 is: 1,384.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.64 : 2,539.06 = 922.68 : x
  2. Step 2: Convert to fraction form
    1,691.64/2,539.06 = 922.68/x
  3. Step 3: Cross multiply
    1,691.64x = 2,539.06 × 922.68
  4. Step 4: Simplify right side
    1,691.64x = 2,342,739.88
  5. Step 5: Solve for x
    x = 2,342,739.88/1,691.64
  6. Step 6: Final answer
    x = 1,384.89

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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.