Home / 2,878.56-4,319.40-2,011.20

Finding the Fourth Proportional to 2,878.56, 4,319.40 and 2,011.20

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Solution

The fourth proportional to 2,878.56, 4,319.40 and 2,011.20 is: 3,017.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.56 : 4,319.40 = 2,011.20 : x
  2. Step 2: Convert to fraction form
    2,878.56/4,319.40 = 2,011.20/x
  3. Step 3: Cross multiply
    2,878.56x = 4,319.40 × 2,011.20
  4. Step 4: Simplify right side
    2,878.56x = 8,687,177.28
  5. Step 5: Solve for x
    x = 8,687,177.28/2,878.56
  6. Step 6: Final answer
    x = 3,017.89

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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.