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Finding the Fourth Proportional to 746.01, 1,118.22 and 486.21

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Solution

The fourth proportional to 746.01, 1,118.22 and 486.21 is: 728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.01 : 1,118.22 = 486.21 : x
  2. Step 2: Convert to fraction form
    746.01/1,118.22 = 486.21/x
  3. Step 3: Cross multiply
    746.01x = 1,118.22 × 486.21
  4. Step 4: Simplify right side
    746.01x = 543,689.75
  5. Step 5: Solve for x
    x = 543,689.75/746.01
  6. Step 6: Final answer
    x = 728.80

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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.