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Finding the Fourth Proportional to 1,023.27, 1,412.11 and 557.52

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Solution

The fourth proportional to 1,023.27, 1,412.11 and 557.52 is: 769.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.27 : 1,412.11 = 557.52 : x
  2. Step 2: Convert to fraction form
    1,023.27/1,412.11 = 557.52/x
  3. Step 3: Cross multiply
    1,023.27x = 1,412.11 × 557.52
  4. Step 4: Simplify right side
    1,023.27x = 787,272.51
  5. Step 5: Solve for x
    x = 787,272.51/1,023.27
  6. Step 6: Final answer
    x = 769.37

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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.