Home / 3,191.20-4,780.08-1,461.28

Finding the Fourth Proportional to 3,191.20, 4,780.08 and 1,461.28

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Solution

The fourth proportional to 3,191.20, 4,780.08 and 1,461.28 is: 2,188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.20 : 4,780.08 = 1,461.28 : x
  2. Step 2: Convert to fraction form
    3,191.20/4,780.08 = 1,461.28/x
  3. Step 3: Cross multiply
    3,191.20x = 4,780.08 × 1,461.28
  4. Step 4: Simplify right side
    3,191.20x = 6,985,035.30
  5. Step 5: Solve for x
    x = 6,985,035.30/3,191.20
  6. Step 6: Final answer
    x = 2,188.84

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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.