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Finding the Fourth Proportional to 1,167.56, 1,610.90 and 669.90

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Solution

The fourth proportional to 1,167.56, 1,610.90 and 669.90 is: 924.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.56 : 1,610.90 = 669.90 : x
  2. Step 2: Convert to fraction form
    1,167.56/1,610.90 = 669.90/x
  3. Step 3: Cross multiply
    1,167.56x = 1,610.90 × 669.90
  4. Step 4: Simplify right side
    1,167.56x = 1,079,141.91
  5. Step 5: Solve for x
    x = 1,079,141.91/1,167.56
  6. Step 6: Final answer
    x = 924.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.