Home / 3,187.20-4,775.40-1,540.20

Finding the Fourth Proportional to 3,187.20, 4,775.40 and 1,540.20

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Solution

The fourth proportional to 3,187.20, 4,775.40 and 1,540.20 is: 2,307.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.20 : 4,775.40 = 1,540.20 : x
  2. Step 2: Convert to fraction form
    3,187.20/4,775.40 = 1,540.20/x
  3. Step 3: Cross multiply
    3,187.20x = 4,775.40 × 1,540.20
  4. Step 4: Simplify right side
    3,187.20x = 7,355,071.08
  5. Step 5: Solve for x
    x = 7,355,071.08/3,187.20
  6. Step 6: Final answer
    x = 2,307.69

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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.