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Finding the Fourth Proportional to 720.84, 1,081.08 and 233.76

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Solution

The fourth proportional to 720.84, 1,081.08 and 233.76 is: 350.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.84 : 1,081.08 = 233.76 : x
  2. Step 2: Convert to fraction form
    720.84/1,081.08 = 233.76/x
  3. Step 3: Cross multiply
    720.84x = 1,081.08 × 233.76
  4. Step 4: Simplify right side
    720.84x = 252,713.26
  5. Step 5: Solve for x
    x = 252,713.26/720.84
  6. Step 6: Final answer
    x = 350.58

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1.5x scale

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.