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Finding the Fourth Proportional to 974.77, 1,345.20 and 532.68

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Solution

The fourth proportional to 974.77, 1,345.20 and 532.68 is: 735.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.77 : 1,345.20 = 532.68 : x
  2. Step 2: Convert to fraction form
    974.77/1,345.20 = 532.68/x
  3. Step 3: Cross multiply
    974.77x = 1,345.20 × 532.68
  4. Step 4: Simplify right side
    974.77x = 716,561.14
  5. Step 5: Solve for x
    x = 716,561.14/974.77
  6. Step 6: Final answer
    x = 735.11

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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.