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Finding the Fourth Proportional to 746.11, 1,117.16 and 485.33

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Solution

The fourth proportional to 746.11, 1,117.16 and 485.33 is: 726.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.11 : 1,117.16 = 485.33 : x
  2. Step 2: Convert to fraction form
    746.11/1,117.16 = 485.33/x
  3. Step 3: Cross multiply
    746.11x = 1,117.16 × 485.33
  4. Step 4: Simplify right side
    746.11x = 542,188.84
  5. Step 5: Solve for x
    x = 542,188.84/746.11
  6. Step 6: Final answer
    x = 726.69

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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.