Home / 2,178.13-3,003.75-1,432.72

Finding the Fourth Proportional to 2,178.13, 3,003.75 and 1,432.72

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Solution

The fourth proportional to 2,178.13, 3,003.75 and 1,432.72 is: 1,975.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.13 : 3,003.75 = 1,432.72 : x
  2. Step 2: Convert to fraction form
    2,178.13/3,003.75 = 1,432.72/x
  3. Step 3: Cross multiply
    2,178.13x = 3,003.75 × 1,432.72
  4. Step 4: Simplify right side
    2,178.13x = 4,303,532.70
  5. Step 5: Solve for x
    x = 4,303,532.70/2,178.13
  6. Step 6: Final answer
    x = 1,975.79

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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.