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Finding the Fourth Proportional to 720.99, 1,080.82 and 525.98

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Solution

The fourth proportional to 720.99, 1,080.82 and 525.98 is: 788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.99 : 1,080.82 = 525.98 : x
  2. Step 2: Convert to fraction form
    720.99/1,080.82 = 525.98/x
  3. Step 3: Cross multiply
    720.99x = 1,080.82 × 525.98
  4. Step 4: Simplify right side
    720.99x = 568,489.70
  5. Step 5: Solve for x
    x = 568,489.70/720.99
  6. Step 6: Final answer
    x = 788.48

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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.