Home / 2,815.32-4,220.12-1,353.72

Finding the Fourth Proportional to 2,815.32, 4,220.12 and 1,353.72

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Solution

The fourth proportional to 2,815.32, 4,220.12 and 1,353.72 is: 2,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.32 : 4,220.12 = 1,353.72 : x
  2. Step 2: Convert to fraction form
    2,815.32/4,220.12 = 1,353.72/x
  3. Step 3: Cross multiply
    2,815.32x = 4,220.12 × 1,353.72
  4. Step 4: Simplify right side
    2,815.32x = 5,712,860.85
  5. Step 5: Solve for x
    x = 5,712,860.85/2,815.32
  6. Step 6: Final answer
    x = 2,029.20

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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.