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Finding the Fourth Proportional to 718.72, 1,079.17 and 683.98

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Solution

The fourth proportional to 718.72, 1,079.17 and 683.98 is: 1,027.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.72 : 1,079.17 = 683.98 : x
  2. Step 2: Convert to fraction form
    718.72/1,079.17 = 683.98/x
  3. Step 3: Cross multiply
    718.72x = 1,079.17 × 683.98
  4. Step 4: Simplify right side
    718.72x = 738,130.70
  5. Step 5: Solve for x
    x = 738,130.70/718.72
  6. Step 6: Final answer
    x = 1,027.01

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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.