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Finding the Fourth Proportional to 769.47, 1,153.35 and 586.28

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Solution

The fourth proportional to 769.47, 1,153.35 and 586.28 is: 878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.47 : 1,153.35 = 586.28 : x
  2. Step 2: Convert to fraction form
    769.47/1,153.35 = 586.28/x
  3. Step 3: Cross multiply
    769.47x = 1,153.35 × 586.28
  4. Step 4: Simplify right side
    769.47x = 676,180.27
  5. Step 5: Solve for x
    x = 676,180.27/769.47
  6. Step 6: Final answer
    x = 878.76

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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.