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Finding the Fourth Proportional to 720.68, 1,081.05 and 233.67

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Solution

The fourth proportional to 720.68, 1,081.05 and 233.67 is: 350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.68 : 1,081.05 = 233.67 : x
  2. Step 2: Convert to fraction form
    720.68/1,081.05 = 233.67/x
  3. Step 3: Cross multiply
    720.68x = 1,081.05 × 233.67
  4. Step 4: Simplify right side
    720.68x = 252,608.95
  5. Step 5: Solve for x
    x = 252,608.95/720.68
  6. Step 6: Final answer
    x = 350.51

Related Problems

Find fourth proportional to 360.34, 540.53 and 116.84
Half scale
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Double scale
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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.