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Finding the Fourth Proportional to 915.33, 1,373.15 and 395.49

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Solution

The fourth proportional to 915.33, 1,373.15 and 395.49 is: 593.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.33 : 1,373.15 = 395.49 : x
  2. Step 2: Convert to fraction form
    915.33/1,373.15 = 395.49/x
  3. Step 3: Cross multiply
    915.33x = 1,373.15 × 395.49
  4. Step 4: Simplify right side
    915.33x = 543,069.08
  5. Step 5: Solve for x
    x = 543,069.08/915.33
  6. Step 6: Final answer
    x = 593.30

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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.