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Finding the Fourth Proportional to 1,174.79, 1,621.22 and 677.43

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Solution

The fourth proportional to 1,174.79, 1,621.22 and 677.43 is: 934.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.79 : 1,621.22 = 677.43 : x
  2. Step 2: Convert to fraction form
    1,174.79/1,621.22 = 677.43/x
  3. Step 3: Cross multiply
    1,174.79x = 1,621.22 × 677.43
  4. Step 4: Simplify right side
    1,174.79x = 1,098,264.76
  5. Step 5: Solve for x
    x = 1,098,264.76/1,174.79
  6. Step 6: Final answer
    x = 934.86

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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.