Home / 4,220.40-6,331.20-1,298.40

Finding the Fourth Proportional to 4,220.40, 6,331.20 and 1,298.40

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Solution

The fourth proportional to 4,220.40, 6,331.20 and 1,298.40 is: 1,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.40 : 6,331.20 = 1,298.40 : x
  2. Step 2: Convert to fraction form
    4,220.40/6,331.20 = 1,298.40/x
  3. Step 3: Cross multiply
    4,220.40x = 6,331.20 × 1,298.40
  4. Step 4: Simplify right side
    4,220.40x = 8,220,430.08
  5. Step 5: Solve for x
    x = 8,220,430.08/4,220.40
  6. Step 6: Final answer
    x = 1,947.78

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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.