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Finding the Fourth Proportional to 974.85, 1,345.30 and 532.79

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Solution

The fourth proportional to 974.85, 1,345.30 and 532.79 is: 735.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.85 : 1,345.30 = 532.79 : x
  2. Step 2: Convert to fraction form
    974.85/1,345.30 = 532.79/x
  3. Step 3: Cross multiply
    974.85x = 1,345.30 × 532.79
  4. Step 4: Simplify right side
    974.85x = 716,755.66
  5. Step 5: Solve for x
    x = 716,755.66/974.85
  6. Step 6: Final answer
    x = 735.25

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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.