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Finding the Fourth Proportional to 1,023.48, 1,412.42 and 557.80

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Solution

The fourth proportional to 1,023.48, 1,412.42 and 557.80 is: 769.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.48 : 1,412.42 = 557.80 : x
  2. Step 2: Convert to fraction form
    1,023.48/1,412.42 = 557.80/x
  3. Step 3: Cross multiply
    1,023.48x = 1,412.42 × 557.80
  4. Step 4: Simplify right side
    1,023.48x = 787,847.88
  5. Step 5: Solve for x
    x = 787,847.88/1,023.48
  6. Step 6: Final answer
    x = 769.77

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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.