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Finding the Fourth Proportional to 974.71, 1,455.11 and 940.53

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Solution

The fourth proportional to 974.71, 1,455.11 and 940.53 is: 1,404.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.71 : 1,455.11 = 940.53 : x
  2. Step 2: Convert to fraction form
    974.71/1,455.11 = 940.53/x
  3. Step 3: Cross multiply
    974.71x = 1,455.11 × 940.53
  4. Step 4: Simplify right side
    974.71x = 1,368,576.96
  5. Step 5: Solve for x
    x = 1,368,576.96/974.71
  6. Step 6: Final answer
    x = 1,404.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.