Home / 2,425.28-3,639.60-1,330.40

Finding the Fourth Proportional to 2,425.28, 3,639.60 and 1,330.40

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Solution

The fourth proportional to 2,425.28, 3,639.60 and 1,330.40 is: 1,996.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,425.28 : 3,639.60 = 1,330.40 : x
  2. Step 2: Convert to fraction form
    2,425.28/3,639.60 = 1,330.40/x
  3. Step 3: Cross multiply
    2,425.28x = 3,639.60 × 1,330.40
  4. Step 4: Simplify right side
    2,425.28x = 4,842,123.84
  5. Step 5: Solve for x
    x = 4,842,123.84/2,425.28
  6. Step 6: Final answer
    x = 1,996.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.