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Finding the Fourth Proportional to 915.04, 1,371.53 and 453.13

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Solution

The fourth proportional to 915.04, 1,371.53 and 453.13 is: 679.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.04 : 1,371.53 = 453.13 : x
  2. Step 2: Convert to fraction form
    915.04/1,371.53 = 453.13/x
  3. Step 3: Cross multiply
    915.04x = 1,371.53 × 453.13
  4. Step 4: Simplify right side
    915.04x = 621,481.39
  5. Step 5: Solve for x
    x = 621,481.39/915.04
  6. Step 6: Final answer
    x = 679.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.