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Finding the Fourth Proportional to 677.01, 921.78 and 674.85

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Solution

The fourth proportional to 677.01, 921.78 and 674.85 is: 918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.01 : 921.78 = 674.85 : x
  2. Step 2: Convert to fraction form
    677.01/921.78 = 674.85/x
  3. Step 3: Cross multiply
    677.01x = 921.78 × 674.85
  4. Step 4: Simplify right side
    677.01x = 622,063.23
  5. Step 5: Solve for x
    x = 622,063.23/677.01
  6. Step 6: Final answer
    x = 918.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.