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Finding the Fourth Proportional to 1,234.28, 1,851.44 and 959.72

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Solution

The fourth proportional to 1,234.28, 1,851.44 and 959.72 is: 1,439.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.28 : 1,851.44 = 959.72 : x
  2. Step 2: Convert to fraction form
    1,234.28/1,851.44 = 959.72/x
  3. Step 3: Cross multiply
    1,234.28x = 1,851.44 × 959.72
  4. Step 4: Simplify right side
    1,234.28x = 1,776,864.00
  5. Step 5: Solve for x
    x = 1,776,864.00/1,234.28
  6. Step 6: Final answer
    x = 1,439.60

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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.