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Finding the Fourth Proportional to 750.63, 1,123.65 and 672.57

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Solution

The fourth proportional to 750.63, 1,123.65 and 672.57 is: 1,006.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.63 : 1,123.65 = 672.57 : x
  2. Step 2: Convert to fraction form
    750.63/1,123.65 = 672.57/x
  3. Step 3: Cross multiply
    750.63x = 1,123.65 × 672.57
  4. Step 4: Simplify right side
    750.63x = 755,733.28
  5. Step 5: Solve for x
    x = 755,733.28/750.63
  6. Step 6: Final answer
    x = 1,006.80

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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.