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Finding the Fourth Proportional to 1,142.01, 1,712.25 and 922.91

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Solution

The fourth proportional to 1,142.01, 1,712.25 and 922.91 is: 1,383.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.01 : 1,712.25 = 922.91 : x
  2. Step 2: Convert to fraction form
    1,142.01/1,712.25 = 922.91/x
  3. Step 3: Cross multiply
    1,142.01x = 1,712.25 × 922.91
  4. Step 4: Simplify right side
    1,142.01x = 1,580,244.09
  5. Step 5: Solve for x
    x = 1,580,244.09/1,142.01
  6. Step 6: Final answer
    x = 1,383.74

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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.