Home / 2,870.13-4,305.20-1,138.75

Finding the Fourth Proportional to 2,870.13, 4,305.20 and 1,138.75

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Solution

The fourth proportional to 2,870.13, 4,305.20 and 1,138.75 is: 1,708.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.13 : 4,305.20 = 1,138.75 : x
  2. Step 2: Convert to fraction form
    2,870.13/4,305.20 = 1,138.75/x
  3. Step 3: Cross multiply
    2,870.13x = 4,305.20 × 1,138.75
  4. Step 4: Simplify right side
    2,870.13x = 4,902,546.50
  5. Step 5: Solve for x
    x = 4,902,546.50/2,870.13
  6. Step 6: Final answer
    x = 1,708.13

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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.