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Finding the Fourth Proportional to 1,174.84, 1,621.49 and 677.60

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Solution

The fourth proportional to 1,174.84, 1,621.49 and 677.60 is: 935.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.84 : 1,621.49 = 677.60 : x
  2. Step 2: Convert to fraction form
    1,174.84/1,621.49 = 677.60/x
  3. Step 3: Cross multiply
    1,174.84x = 1,621.49 × 677.60
  4. Step 4: Simplify right side
    1,174.84x = 1,098,716.21
  5. Step 5: Solve for x
    x = 1,098,716.21/1,174.84
  6. Step 6: Final answer
    x = 935.21

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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.