Home / 4,778.40-7,167.72-2,312.76

Finding the Fourth Proportional to 4,778.40, 7,167.72 and 2,312.76

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Solution

The fourth proportional to 4,778.40, 7,167.72 and 2,312.76 is: 3,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,778.40 : 7,167.72 = 2,312.76 : x
  2. Step 2: Convert to fraction form
    4,778.40/7,167.72 = 2,312.76/x
  3. Step 3: Cross multiply
    4,778.40x = 7,167.72 × 2,312.76
  4. Step 4: Simplify right side
    4,778.40x = 16,577,216.11
  5. Step 5: Solve for x
    x = 16,577,216.11/4,778.40
  6. Step 6: Final answer
    x = 3,469.20

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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.