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Finding the Fourth Proportional to 1,035.59, 1,553.72 and 515.77

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Solution

The fourth proportional to 1,035.59, 1,553.72 and 515.77 is: 773.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.59 : 1,553.72 = 515.77 : x
  2. Step 2: Convert to fraction form
    1,035.59/1,553.72 = 515.77/x
  3. Step 3: Cross multiply
    1,035.59x = 1,553.72 × 515.77
  4. Step 4: Simplify right side
    1,035.59x = 801,355.70
  5. Step 5: Solve for x
    x = 801,355.70/1,035.59
  6. Step 6: Final answer
    x = 773.82

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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.