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Finding the Fourth Proportional to 679.68, 936.32 and 560.88

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Solution

The fourth proportional to 679.68, 936.32 and 560.88 is: 772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.68 : 936.32 = 560.88 : x
  2. Step 2: Convert to fraction form
    679.68/936.32 = 560.88/x
  3. Step 3: Cross multiply
    679.68x = 936.32 × 560.88
  4. Step 4: Simplify right side
    679.68x = 525,163.16
  5. Step 5: Solve for x
    x = 525,163.16/679.68
  6. Step 6: Final answer
    x = 772.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.