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Finding the Fourth Proportional to 915.34, 1,373.77 and 539.74

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Solution

The fourth proportional to 915.34, 1,373.77 and 539.74 is: 810.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.34 : 1,373.77 = 539.74 : x
  2. Step 2: Convert to fraction form
    915.34/1,373.77 = 539.74/x
  3. Step 3: Cross multiply
    915.34x = 1,373.77 × 539.74
  4. Step 4: Simplify right side
    915.34x = 741,478.62
  5. Step 5: Solve for x
    x = 741,478.62/915.34
  6. Step 6: Final answer
    x = 810.06

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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.