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Finding the Fourth Proportional to 775.44, 1,070.96 and 527.45

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Solution

The fourth proportional to 775.44, 1,070.96 and 527.45 is: 728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.44 : 1,070.96 = 527.45 : x
  2. Step 2: Convert to fraction form
    775.44/1,070.96 = 527.45/x
  3. Step 3: Cross multiply
    775.44x = 1,070.96 × 527.45
  4. Step 4: Simplify right side
    775.44x = 564,869.86
  5. Step 5: Solve for x
    x = 564,869.86/775.44
  6. Step 6: Final answer
    x = 728.45

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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.