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Finding the Fourth Proportional to 1,201.77, 1,658.46 and 677.91

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Solution

The fourth proportional to 1,201.77, 1,658.46 and 677.91 is: 935.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.77 : 1,658.46 = 677.91 : x
  2. Step 2: Convert to fraction form
    1,201.77/1,658.46 = 677.91/x
  3. Step 3: Cross multiply
    1,201.77x = 1,658.46 × 677.91
  4. Step 4: Simplify right side
    1,201.77x = 1,124,286.62
  5. Step 5: Solve for x
    x = 1,124,286.62/1,201.77
  6. Step 6: Final answer
    x = 935.53

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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.