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Finding the Fourth Proportional to 1,005.20, 1,506.60 and 517.52

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Solution

The fourth proportional to 1,005.20, 1,506.60 and 517.52 is: 775.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.20 : 1,506.60 = 517.52 : x
  2. Step 2: Convert to fraction form
    1,005.20/1,506.60 = 517.52/x
  3. Step 3: Cross multiply
    1,005.20x = 1,506.60 × 517.52
  4. Step 4: Simplify right side
    1,005.20x = 779,695.63
  5. Step 5: Solve for x
    x = 779,695.63/1,005.20
  6. Step 6: Final answer
    x = 775.66

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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.