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Finding the Fourth Proportional to 686.98, 941.86 and 674.70

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Solution

The fourth proportional to 686.98, 941.86 and 674.70 is: 925.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.98 : 941.86 = 674.70 : x
  2. Step 2: Convert to fraction form
    686.98/941.86 = 674.70/x
  3. Step 3: Cross multiply
    686.98x = 941.86 × 674.70
  4. Step 4: Simplify right side
    686.98x = 635,472.94
  5. Step 5: Solve for x
    x = 635,472.94/686.98
  6. Step 6: Final answer
    x = 925.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.