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Finding the Fourth Proportional to 697.52, 1,045.29 and 513.47

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Solution

The fourth proportional to 697.52, 1,045.29 and 513.47 is: 769.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.52 : 1,045.29 = 513.47 : x
  2. Step 2: Convert to fraction form
    697.52/1,045.29 = 513.47/x
  3. Step 3: Cross multiply
    697.52x = 1,045.29 × 513.47
  4. Step 4: Simplify right side
    697.52x = 536,729.60
  5. Step 5: Solve for x
    x = 536,729.60/697.52
  6. Step 6: Final answer
    x = 769.48

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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.