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Finding the Fourth Proportional to 974.47, 1,344.71 and 576.15

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Solution

The fourth proportional to 974.47, 1,344.71 and 576.15 is: 795.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.47 : 1,344.71 = 576.15 : x
  2. Step 2: Convert to fraction form
    974.47/1,344.71 = 576.15/x
  3. Step 3: Cross multiply
    974.47x = 1,344.71 × 576.15
  4. Step 4: Simplify right side
    974.47x = 774,754.67
  5. Step 5: Solve for x
    x = 774,754.67/974.47
  6. Step 6: Final answer
    x = 795.05

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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.