Home / 1,212.08-1,818.40-432.04

Finding the Fourth Proportional to 1,212.08, 1,818.40 and 432.04

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Solution

The fourth proportional to 1,212.08, 1,818.40 and 432.04 is: 648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.08 : 1,818.40 = 432.04 : x
  2. Step 2: Convert to fraction form
    1,212.08/1,818.40 = 432.04/x
  3. Step 3: Cross multiply
    1,212.08x = 1,818.40 × 432.04
  4. Step 4: Simplify right side
    1,212.08x = 785,621.54
  5. Step 5: Solve for x
    x = 785,621.54/1,212.08
  6. Step 6: Final answer
    x = 648.16

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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.