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Finding the Fourth Proportional to 915.89, 1,373.74 and 299.48

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Solution

The fourth proportional to 915.89, 1,373.74 and 299.48 is: 449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.89 : 1,373.74 = 299.48 : x
  2. Step 2: Convert to fraction form
    915.89/1,373.74 = 299.48/x
  3. Step 3: Cross multiply
    915.89x = 1,373.74 × 299.48
  4. Step 4: Simplify right side
    915.89x = 411,407.66
  5. Step 5: Solve for x
    x = 411,407.66/915.89
  6. Step 6: Final answer
    x = 449.19

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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.