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Finding the Fourth Proportional to 974.89, 1,345.18 and 925.64

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Solution

The fourth proportional to 974.89, 1,345.18 and 925.64 is: 1,277.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.89 : 1,345.18 = 925.64 : x
  2. Step 2: Convert to fraction form
    974.89/1,345.18 = 925.64/x
  3. Step 3: Cross multiply
    974.89x = 1,345.18 × 925.64
  4. Step 4: Simplify right side
    974.89x = 1,245,152.42
  5. Step 5: Solve for x
    x = 1,245,152.42/974.89
  6. Step 6: Final answer
    x = 1,277.22

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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.