Home / 2,947.60-4,421.40-2,072.80

Finding the Fourth Proportional to 2,947.60, 4,421.40 and 2,072.80

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Solution

The fourth proportional to 2,947.60, 4,421.40 and 2,072.80 is: 3,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.60 : 4,421.40 = 2,072.80 : x
  2. Step 2: Convert to fraction form
    2,947.60/4,421.40 = 2,072.80/x
  3. Step 3: Cross multiply
    2,947.60x = 4,421.40 × 2,072.80
  4. Step 4: Simplify right side
    2,947.60x = 9,164,677.92
  5. Step 5: Solve for x
    x = 9,164,677.92/2,947.60
  6. Step 6: Final answer
    x = 3,109.20

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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.