Home / 2,478.76-3,420.69-1,359.79

Finding the Fourth Proportional to 2,478.76, 3,420.69 and 1,359.79

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Solution

The fourth proportional to 2,478.76, 3,420.69 and 1,359.79 is: 1,876.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.76 : 3,420.69 = 1,359.79 : x
  2. Step 2: Convert to fraction form
    2,478.76/3,420.69 = 1,359.79/x
  3. Step 3: Cross multiply
    2,478.76x = 3,420.69 × 1,359.79
  4. Step 4: Simplify right side
    2,478.76x = 4,651,420.06
  5. Step 5: Solve for x
    x = 4,651,420.06/2,478.76
  6. Step 6: Final answer
    x = 1,876.51

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1.5x scale

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.