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Finding the Fourth Proportional to 742.83, 1,113.72 and 326.16

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Solution

The fourth proportional to 742.83, 1,113.72 and 326.16 is: 489.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.83 : 1,113.72 = 326.16 : x
  2. Step 2: Convert to fraction form
    742.83/1,113.72 = 326.16/x
  3. Step 3: Cross multiply
    742.83x = 1,113.72 × 326.16
  4. Step 4: Simplify right side
    742.83x = 363,250.92
  5. Step 5: Solve for x
    x = 363,250.92/742.83
  6. Step 6: Final answer
    x = 489.01

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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.