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Finding the Fourth Proportional to 719.59, 1,080.30 and 715.96

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Solution

The fourth proportional to 719.59, 1,080.30 and 715.96 is: 1,074.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.59 : 1,080.30 = 715.96 : x
  2. Step 2: Convert to fraction form
    719.59/1,080.30 = 715.96/x
  3. Step 3: Cross multiply
    719.59x = 1,080.30 × 715.96
  4. Step 4: Simplify right side
    719.59x = 773,451.59
  5. Step 5: Solve for x
    x = 773,451.59/719.59
  6. Step 6: Final answer
    x = 1,074.85

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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.