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Finding the Fourth Proportional to 720.63, 1,080.90 and 233.66

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Solution

The fourth proportional to 720.63, 1,080.90 and 233.66 is: 350.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.63 : 1,080.90 = 233.66 : x
  2. Step 2: Convert to fraction form
    720.63/1,080.90 = 233.66/x
  3. Step 3: Cross multiply
    720.63x = 1,080.90 × 233.66
  4. Step 4: Simplify right side
    720.63x = 252,565.80
  5. Step 5: Solve for x
    x = 252,565.80/720.63
  6. Step 6: Final answer
    x = 350.48

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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.