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Finding the Fourth Proportional to 932.61, 1,288.80 and 755.22

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Solution

The fourth proportional to 932.61, 1,288.80 and 755.22 is: 1,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.61 : 1,288.80 = 755.22 : x
  2. Step 2: Convert to fraction form
    932.61/1,288.80 = 755.22/x
  3. Step 3: Cross multiply
    932.61x = 1,288.80 × 755.22
  4. Step 4: Simplify right side
    932.61x = 973,327.54
  5. Step 5: Solve for x
    x = 973,327.54/932.61
  6. Step 6: Final answer
    x = 1,043.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.