Home / 2,478.28-3,419.78-1,430.68

Finding the Fourth Proportional to 2,478.28, 3,419.78 and 1,430.68

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Solution

The fourth proportional to 2,478.28, 3,419.78 and 1,430.68 is: 1,974.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.28 : 3,419.78 = 1,430.68 : x
  2. Step 2: Convert to fraction form
    2,478.28/3,419.78 = 1,430.68/x
  3. Step 3: Cross multiply
    2,478.28x = 3,419.78 × 1,430.68
  4. Step 4: Simplify right side
    2,478.28x = 4,892,610.85
  5. Step 5: Solve for x
    x = 4,892,610.85/2,478.28
  6. Step 6: Final answer
    x = 1,974.20

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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.