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Finding the Fourth Proportional to 974.95, 1,345.42 and 532.85

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Solution

The fourth proportional to 974.95, 1,345.42 and 532.85 is: 735.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.95 : 1,345.42 = 532.85 : x
  2. Step 2: Convert to fraction form
    974.95/1,345.42 = 532.85/x
  3. Step 3: Cross multiply
    974.95x = 1,345.42 × 532.85
  4. Step 4: Simplify right side
    974.95x = 716,909.08
  5. Step 5: Solve for x
    x = 716,909.08/974.95
  6. Step 6: Final answer
    x = 735.33

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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.