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Finding the Fourth Proportional to 1,839.13, 2,756.62 and 915.35

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Solution

The fourth proportional to 1,839.13, 2,756.62 and 915.35 is: 1,371.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.13 : 2,756.62 = 915.35 : x
  2. Step 2: Convert to fraction form
    1,839.13/2,756.62 = 915.35/x
  3. Step 3: Cross multiply
    1,839.13x = 2,756.62 × 915.35
  4. Step 4: Simplify right side
    1,839.13x = 2,523,272.12
  5. Step 5: Solve for x
    x = 2,523,272.12/1,839.13
  6. Step 6: Final answer
    x = 1,371.99

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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.