Home / 2,051.20-2,830.50-1,119.70

Finding the Fourth Proportional to 2,051.20, 2,830.50 and 1,119.70

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Solution

The fourth proportional to 2,051.20, 2,830.50 and 1,119.70 is: 1,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.20 : 2,830.50 = 1,119.70 : x
  2. Step 2: Convert to fraction form
    2,051.20/2,830.50 = 1,119.70/x
  3. Step 3: Cross multiply
    2,051.20x = 2,830.50 × 1,119.70
  4. Step 4: Simplify right side
    2,051.20x = 3,169,310.85
  5. Step 5: Solve for x
    x = 3,169,310.85/2,051.20
  6. Step 6: Final answer
    x = 1,545.10

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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.