Home / 1,937.78-2,905.45-1,278.95

Finding the Fourth Proportional to 1,937.78, 2,905.45 and 1,278.95

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Solution

The fourth proportional to 1,937.78, 2,905.45 and 1,278.95 is: 1,917.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,937.78 : 2,905.45 = 1,278.95 : x
  2. Step 2: Convert to fraction form
    1,937.78/2,905.45 = 1,278.95/x
  3. Step 3: Cross multiply
    1,937.78x = 2,905.45 × 1,278.95
  4. Step 4: Simplify right side
    1,937.78x = 3,715,925.28
  5. Step 5: Solve for x
    x = 3,715,925.28/1,937.78
  6. Step 6: Final answer
    x = 1,917.62

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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.