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Finding the Fourth Proportional to 1,454.76, 2,179.40 and 722.12

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Solution

The fourth proportional to 1,454.76, 2,179.40 and 722.12 is: 1,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.76 : 2,179.40 = 722.12 : x
  2. Step 2: Convert to fraction form
    1,454.76/2,179.40 = 722.12/x
  3. Step 3: Cross multiply
    1,454.76x = 2,179.40 × 722.12
  4. Step 4: Simplify right side
    1,454.76x = 1,573,773.82
  5. Step 5: Solve for x
    x = 1,573,773.82/1,454.76
  6. Step 6: Final answer
    x = 1,081.81

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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.