Home / 3,127.70-4,691.54-1,278.40

Finding the Fourth Proportional to 3,127.70, 4,691.54 and 1,278.40

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Solution

The fourth proportional to 3,127.70, 4,691.54 and 1,278.40 is: 1,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.70 : 4,691.54 = 1,278.40 : x
  2. Step 2: Convert to fraction form
    3,127.70/4,691.54 = 1,278.40/x
  3. Step 3: Cross multiply
    3,127.70x = 4,691.54 × 1,278.40
  4. Step 4: Simplify right side
    3,127.70x = 5,997,664.74
  5. Step 5: Solve for x
    x = 5,997,664.74/3,127.70
  6. Step 6: Final answer
    x = 1,917.60

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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.