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Finding the Fourth Proportional to 864.47, 1,296.83 and 755.39

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Solution

The fourth proportional to 864.47, 1,296.83 and 755.39 is: 1,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.47 : 1,296.83 = 755.39 : x
  2. Step 2: Convert to fraction form
    864.47/1,296.83 = 755.39/x
  3. Step 3: Cross multiply
    864.47x = 1,296.83 × 755.39
  4. Step 4: Simplify right side
    864.47x = 979,607.82
  5. Step 5: Solve for x
    x = 979,607.82/864.47
  6. Step 6: Final answer
    x = 1,133.20

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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.