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Finding the Fourth Proportional to 1,197.34, 1,651.61 and 724.90

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Solution

The fourth proportional to 1,197.34, 1,651.61 and 724.90 is: 999.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.34 : 1,651.61 = 724.90 : x
  2. Step 2: Convert to fraction form
    1,197.34/1,651.61 = 724.90/x
  3. Step 3: Cross multiply
    1,197.34x = 1,651.61 × 724.90
  4. Step 4: Simplify right side
    1,197.34x = 1,197,252.09
  5. Step 5: Solve for x
    x = 1,197,252.09/1,197.34
  6. Step 6: Final answer
    x = 999.93

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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.