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Finding the Fourth Proportional to 680.12, 1,021.04 and 565.96

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Solution

The fourth proportional to 680.12, 1,021.04 and 565.96 is: 849.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.12 : 1,021.04 = 565.96 : x
  2. Step 2: Convert to fraction form
    680.12/1,021.04 = 565.96/x
  3. Step 3: Cross multiply
    680.12x = 1,021.04 × 565.96
  4. Step 4: Simplify right side
    680.12x = 577,871.71
  5. Step 5: Solve for x
    x = 577,871.71/680.12
  6. Step 6: Final answer
    x = 849.66

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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.