Home / 5,478.40-7,541.14-4,778.56

Finding the Fourth Proportional to 5,478.40, 7,541.14 and 4,778.56

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Solution

The fourth proportional to 5,478.40, 7,541.14 and 4,778.56 is: 6,577.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.40 : 7,541.14 = 4,778.56 : x
  2. Step 2: Convert to fraction form
    5,478.40/7,541.14 = 4,778.56/x
  3. Step 3: Cross multiply
    5,478.40x = 7,541.14 × 4,778.56
  4. Step 4: Simplify right side
    5,478.40x = 36,035,789.96
  5. Step 5: Solve for x
    x = 36,035,789.96/5,478.40
  6. Step 6: Final answer
    x = 6,577.79

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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.