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Finding the Fourth Proportional to 1,023.59, 1,412.57 and 557.84

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Solution

The fourth proportional to 1,023.59, 1,412.57 and 557.84 is: 769.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.59 : 1,412.57 = 557.84 : x
  2. Step 2: Convert to fraction form
    1,023.59/1,412.57 = 557.84/x
  3. Step 3: Cross multiply
    1,023.59x = 1,412.57 × 557.84
  4. Step 4: Simplify right side
    1,023.59x = 787,988.05
  5. Step 5: Solve for x
    x = 787,988.05/1,023.59
  6. Step 6: Final answer
    x = 769.83

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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.