Home / 2,013.90-2,778.80-1,129.66

Finding the Fourth Proportional to 2,013.90, 2,778.80 and 1,129.66

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Solution

The fourth proportional to 2,013.90, 2,778.80 and 1,129.66 is: 1,558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.90 : 2,778.80 = 1,129.66 : x
  2. Step 2: Convert to fraction form
    2,013.90/2,778.80 = 1,129.66/x
  3. Step 3: Cross multiply
    2,013.90x = 2,778.80 × 1,129.66
  4. Step 4: Simplify right side
    2,013.90x = 3,139,099.21
  5. Step 5: Solve for x
    x = 3,139,099.21/2,013.90
  6. Step 6: Final answer
    x = 1,558.72

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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.