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Finding the Fourth Proportional to 1,034.50, 1,551.90 and 719.23

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Solution

The fourth proportional to 1,034.50, 1,551.90 and 719.23 is: 1,078.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.50 : 1,551.90 = 719.23 : x
  2. Step 2: Convert to fraction form
    1,034.50/1,551.90 = 719.23/x
  3. Step 3: Cross multiply
    1,034.50x = 1,551.90 × 719.23
  4. Step 4: Simplify right side
    1,034.50x = 1,116,165.28
  5. Step 5: Solve for x
    x = 1,116,165.28/1,034.50
  6. Step 6: Final answer
    x = 1,078.95

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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.