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Finding the Fourth Proportional to 974.64, 1,345.02 and 532.55

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Solution

The fourth proportional to 974.64, 1,345.02 and 532.55 is: 734.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.64 : 1,345.02 = 532.55 : x
  2. Step 2: Convert to fraction form
    974.64/1,345.02 = 532.55/x
  3. Step 3: Cross multiply
    974.64x = 1,345.02 × 532.55
  4. Step 4: Simplify right side
    974.64x = 716,283.68
  5. Step 5: Solve for x
    x = 716,283.68/974.64
  6. Step 6: Final answer
    x = 734.92

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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.