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Finding the Fourth Proportional to 1,174.61, 1,621.13 and 677.15

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Solution

The fourth proportional to 1,174.61, 1,621.13 and 677.15 is: 934.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.61 : 1,621.13 = 677.15 : x
  2. Step 2: Convert to fraction form
    1,174.61/1,621.13 = 677.15/x
  3. Step 3: Cross multiply
    1,174.61x = 1,621.13 × 677.15
  4. Step 4: Simplify right side
    1,174.61x = 1,097,736.69
  5. Step 5: Solve for x
    x = 1,097,736.69/1,174.61
  6. Step 6: Final answer
    x = 934.56

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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.