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Finding the Fourth Proportional to 747.11, 1,118.65 and 486.33

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Solution

The fourth proportional to 747.11, 1,118.65 and 486.33 is: 728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.11 : 1,118.65 = 486.33 : x
  2. Step 2: Convert to fraction form
    747.11/1,118.65 = 486.33/x
  3. Step 3: Cross multiply
    747.11x = 1,118.65 × 486.33
  4. Step 4: Simplify right side
    747.11x = 544,033.05
  5. Step 5: Solve for x
    x = 544,033.05/747.11
  6. Step 6: Final answer
    x = 728.18

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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.