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Finding the Fourth Proportional to 753.57, 1,129.79 and 568.28

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Solution

The fourth proportional to 753.57, 1,129.79 and 568.28 is: 851.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.57 : 1,129.79 = 568.28 : x
  2. Step 2: Convert to fraction form
    753.57/1,129.79 = 568.28/x
  3. Step 3: Cross multiply
    753.57x = 1,129.79 × 568.28
  4. Step 4: Simplify right side
    753.57x = 642,037.06
  5. Step 5: Solve for x
    x = 642,037.06/753.57
  6. Step 6: Final answer
    x = 851.99

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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.