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Finding the Fourth Proportional to 915.33, 1,373.05 and 388.14

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Solution

The fourth proportional to 915.33, 1,373.05 and 388.14 is: 582.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.33 : 1,373.05 = 388.14 : x
  2. Step 2: Convert to fraction form
    915.33/1,373.05 = 388.14/x
  3. Step 3: Cross multiply
    915.33x = 1,373.05 × 388.14
  4. Step 4: Simplify right side
    915.33x = 532,938.69
  5. Step 5: Solve for x
    x = 532,938.69/915.33
  6. Step 6: Final answer
    x = 582.24

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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.