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Finding the Fourth Proportional to 915.62, 1,372.91 and 360.50

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Solution

The fourth proportional to 915.62, 1,372.91 and 360.50 is: 540.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.62 : 1,372.91 = 360.50 : x
  2. Step 2: Convert to fraction form
    915.62/1,372.91 = 360.50/x
  3. Step 3: Cross multiply
    915.62x = 1,372.91 × 360.50
  4. Step 4: Simplify right side
    915.62x = 494,925.39
  5. Step 5: Solve for x
    x = 494,925.39/915.62
  6. Step 6: Final answer
    x = 540.54

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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.