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Finding the Fourth Proportional to 1,116.54, 1,674.54 and 423.28

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Solution

The fourth proportional to 1,116.54, 1,674.54 and 423.28 is: 634.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.54 : 1,674.54 = 423.28 : x
  2. Step 2: Convert to fraction form
    1,116.54/1,674.54 = 423.28/x
  3. Step 3: Cross multiply
    1,116.54x = 1,674.54 × 423.28
  4. Step 4: Simplify right side
    1,116.54x = 708,799.29
  5. Step 5: Solve for x
    x = 708,799.29/1,116.54
  6. Step 6: Final answer
    x = 634.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.