Home / 2,478.79-3,420.81-1,359.73

Finding the Fourth Proportional to 2,478.79, 3,420.81 and 1,359.73

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Solution

The fourth proportional to 2,478.79, 3,420.81 and 1,359.73 is: 1,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.79 : 3,420.81 = 1,359.73 : x
  2. Step 2: Convert to fraction form
    2,478.79/3,420.81 = 1,359.73/x
  3. Step 3: Cross multiply
    2,478.79x = 3,420.81 × 1,359.73
  4. Step 4: Simplify right side
    2,478.79x = 4,651,354.08
  5. Step 5: Solve for x
    x = 4,651,354.08/2,478.79
  6. Step 6: Final answer
    x = 1,876.47

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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.