Home / 2,778.32-4,165.40-1,315.76

Finding the Fourth Proportional to 2,778.32, 4,165.40 and 1,315.76

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Solution

The fourth proportional to 2,778.32, 4,165.40 and 1,315.76 is: 1,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.32 : 4,165.40 = 1,315.76 : x
  2. Step 2: Convert to fraction form
    2,778.32/4,165.40 = 1,315.76/x
  3. Step 3: Cross multiply
    2,778.32x = 4,165.40 × 1,315.76
  4. Step 4: Simplify right side
    2,778.32x = 5,480,666.70
  5. Step 5: Solve for x
    x = 5,480,666.70/2,778.32
  6. Step 6: Final answer
    x = 1,972.65

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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.