Home / 4,947.60-7,421.40-1,660.80

Finding the Fourth Proportional to 4,947.60, 7,421.40 and 1,660.80

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Solution

The fourth proportional to 4,947.60, 7,421.40 and 1,660.80 is: 2,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.60 : 7,421.40 = 1,660.80 : x
  2. Step 2: Convert to fraction form
    4,947.60/7,421.40 = 1,660.80/x
  3. Step 3: Cross multiply
    4,947.60x = 7,421.40 × 1,660.80
  4. Step 4: Simplify right side
    4,947.60x = 12,325,461.12
  5. Step 5: Solve for x
    x = 12,325,461.12/4,947.60
  6. Step 6: Final answer
    x = 2,491.20

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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.