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Finding the Fourth Proportional to 915.02, 1,371.92 and 453.01

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Solution

The fourth proportional to 915.02, 1,371.92 and 453.01 is: 679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.02 : 1,371.92 = 453.01 : x
  2. Step 2: Convert to fraction form
    915.02/1,371.92 = 453.01/x
  3. Step 3: Cross multiply
    915.02x = 1,371.92 × 453.01
  4. Step 4: Simplify right side
    915.02x = 621,493.48
  5. Step 5: Solve for x
    x = 621,493.48/915.02
  6. Step 6: Final answer
    x = 679.21

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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.