Home / 2,947.28-4,063.56-2,478.80

Finding the Fourth Proportional to 2,947.28, 4,063.56 and 2,478.80

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Solution

The fourth proportional to 2,947.28, 4,063.56 and 2,478.80 is: 3,417.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.28 : 4,063.56 = 2,478.80 : x
  2. Step 2: Convert to fraction form
    2,947.28/4,063.56 = 2,478.80/x
  3. Step 3: Cross multiply
    2,947.28x = 4,063.56 × 2,478.80
  4. Step 4: Simplify right side
    2,947.28x = 10,072,752.53
  5. Step 5: Solve for x
    x = 10,072,752.53/2,947.28
  6. Step 6: Final answer
    x = 3,417.64

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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.