Home / 1,212.38-1,818.67-432.55

Finding the Fourth Proportional to 1,212.38, 1,818.67 and 432.55

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Solution

The fourth proportional to 1,212.38, 1,818.67 and 432.55 is: 648.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.38 : 1,818.67 = 432.55 : x
  2. Step 2: Convert to fraction form
    1,212.38/1,818.67 = 432.55/x
  3. Step 3: Cross multiply
    1,212.38x = 1,818.67 × 432.55
  4. Step 4: Simplify right side
    1,212.38x = 786,665.71
  5. Step 5: Solve for x
    x = 786,665.71/1,212.38
  6. Step 6: Final answer
    x = 648.86

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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.