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Finding the Fourth Proportional to 1,037.72, 1,555.80 and 517.34

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Solution

The fourth proportional to 1,037.72, 1,555.80 and 517.34 is: 775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.72 : 1,555.80 = 517.34 : x
  2. Step 2: Convert to fraction form
    1,037.72/1,555.80 = 517.34/x
  3. Step 3: Cross multiply
    1,037.72x = 1,555.80 × 517.34
  4. Step 4: Simplify right side
    1,037.72x = 804,877.57
  5. Step 5: Solve for x
    x = 804,877.57/1,037.72
  6. Step 6: Final answer
    x = 775.62

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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.