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Finding the Fourth Proportional to 721.02, 1,081.14 and 233.76

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Solution

The fourth proportional to 721.02, 1,081.14 and 233.76 is: 350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.02 : 1,081.14 = 233.76 : x
  2. Step 2: Convert to fraction form
    721.02/1,081.14 = 233.76/x
  3. Step 3: Cross multiply
    721.02x = 1,081.14 × 233.76
  4. Step 4: Simplify right side
    721.02x = 252,727.29
  5. Step 5: Solve for x
    x = 252,727.29/721.02
  6. Step 6: Final answer
    x = 350.51

Related Problems

Find fourth proportional to 360.51, 540.57 and 116.88
Half scale
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Double scale
Find fourth proportional to 722.02, 1,082.64 and 234.76
Similar ratio
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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.