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Finding the Fourth Proportional to 708.02, 1,060.20 and 690.60

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Solution

The fourth proportional to 708.02, 1,060.20 and 690.60 is: 1,034.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.02 : 1,060.20 = 690.60 : x
  2. Step 2: Convert to fraction form
    708.02/1,060.20 = 690.60/x
  3. Step 3: Cross multiply
    708.02x = 1,060.20 × 690.60
  4. Step 4: Simplify right side
    708.02x = 732,174.12
  5. Step 5: Solve for x
    x = 732,174.12/708.02
  6. Step 6: Final answer
    x = 1,034.12

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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.