Home / 3,970.28-5,478.80-2,377.64

Finding the Fourth Proportional to 3,970.28, 5,478.80 and 2,377.64

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Solution

The fourth proportional to 3,970.28, 5,478.80 and 2,377.64 is: 3,281.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.28 : 5,478.80 = 2,377.64 : x
  2. Step 2: Convert to fraction form
    3,970.28/5,478.80 = 2,377.64/x
  3. Step 3: Cross multiply
    3,970.28x = 5,478.80 × 2,377.64
  4. Step 4: Simplify right side
    3,970.28x = 13,026,614.03
  5. Step 5: Solve for x
    x = 13,026,614.03/3,970.28
  6. Step 6: Final answer
    x = 3,281.03

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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.