Home / 2,013.20-2,778.28-1,128.96

Finding the Fourth Proportional to 2,013.20, 2,778.28 and 1,128.96

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Solution

The fourth proportional to 2,013.20, 2,778.28 and 1,128.96 is: 1,558.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.20 : 2,778.28 = 1,128.96 : x
  2. Step 2: Convert to fraction form
    2,013.20/2,778.28 = 1,128.96/x
  3. Step 3: Cross multiply
    2,013.20x = 2,778.28 × 1,128.96
  4. Step 4: Simplify right side
    2,013.20x = 3,136,566.99
  5. Step 5: Solve for x
    x = 3,136,566.99/2,013.20
  6. Step 6: Final answer
    x = 1,558.00

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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.