Home / 3,945.48-5,445.28-3,281.20

Finding the Fourth Proportional to 3,945.48, 5,445.28 and 3,281.20

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Solution

The fourth proportional to 3,945.48, 5,445.28 and 3,281.20 is: 4,528.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.48 : 5,445.28 = 3,281.20 : x
  2. Step 2: Convert to fraction form
    3,945.48/5,445.28 = 3,281.20/x
  3. Step 3: Cross multiply
    3,945.48x = 5,445.28 × 3,281.20
  4. Step 4: Simplify right side
    3,945.48x = 17,867,052.74
  5. Step 5: Solve for x
    x = 17,867,052.74/3,945.48
  6. Step 6: Final answer
    x = 4,528.49

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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.