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Finding the Fourth Proportional to 1,296.70, 1,943.22 and 749.02

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Solution

The fourth proportional to 1,296.70, 1,943.22 and 749.02 is: 1,122.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.70 : 1,943.22 = 749.02 : x
  2. Step 2: Convert to fraction form
    1,296.70/1,943.22 = 749.02/x
  3. Step 3: Cross multiply
    1,296.70x = 1,943.22 × 749.02
  4. Step 4: Simplify right side
    1,296.70x = 1,455,510.64
  5. Step 5: Solve for x
    x = 1,455,510.64/1,296.70
  6. Step 6: Final answer
    x = 1,122.47

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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.