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Finding the Fourth Proportional to 1,174.53, 1,620.78 and 677.13

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Solution

The fourth proportional to 1,174.53, 1,620.78 and 677.13 is: 934.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.53 : 1,620.78 = 677.13 : x
  2. Step 2: Convert to fraction form
    1,174.53/1,620.78 = 677.13/x
  3. Step 3: Cross multiply
    1,174.53x = 1,620.78 × 677.13
  4. Step 4: Simplify right side
    1,174.53x = 1,097,489.53
  5. Step 5: Solve for x
    x = 1,097,489.53/1,174.53
  6. Step 6: Final answer
    x = 934.41

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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.