Home / 2,013.42-2,778.60-1,129.20

Finding the Fourth Proportional to 2,013.42, 2,778.60 and 1,129.20

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Solution

The fourth proportional to 2,013.42, 2,778.60 and 1,129.20 is: 1,558.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.42 : 2,778.60 = 1,129.20 : x
  2. Step 2: Convert to fraction form
    2,013.42/2,778.60 = 1,129.20/x
  3. Step 3: Cross multiply
    2,013.42x = 2,778.60 × 1,129.20
  4. Step 4: Simplify right side
    2,013.42x = 3,137,595.12
  5. Step 5: Solve for x
    x = 3,137,595.12/2,013.42
  6. Step 6: Final answer
    x = 1,558.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.