Home / 1,356.50-2,034.78-432.12

Finding the Fourth Proportional to 1,356.50, 2,034.78 and 432.12

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Solution

The fourth proportional to 1,356.50, 2,034.78 and 432.12 is: 648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.50 : 2,034.78 = 432.12 : x
  2. Step 2: Convert to fraction form
    1,356.50/2,034.78 = 432.12/x
  3. Step 3: Cross multiply
    1,356.50x = 2,034.78 × 432.12
  4. Step 4: Simplify right side
    1,356.50x = 879,269.13
  5. Step 5: Solve for x
    x = 879,269.13/1,356.50
  6. Step 6: Final answer
    x = 648.19

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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.