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Finding the Fourth Proportional to 697.74, 961.61 and 677.75

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Solution

The fourth proportional to 697.74, 961.61 and 677.75 is: 934.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.74 : 961.61 = 677.75 : x
  2. Step 2: Convert to fraction form
    697.74/961.61 = 677.75/x
  3. Step 3: Cross multiply
    697.74x = 961.61 × 677.75
  4. Step 4: Simplify right side
    697.74x = 651,728.06
  5. Step 5: Solve for x
    x = 651,728.06/697.74
  6. Step 6: Final answer
    x = 934.06

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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.