Home / 3,132.40-4,321.29-1,805.62

Finding the Fourth Proportional to 3,132.40, 4,321.29 and 1,805.62

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Solution

The fourth proportional to 3,132.40, 4,321.29 and 1,805.62 is: 2,490.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,132.40 : 4,321.29 = 1,805.62 : x
  2. Step 2: Convert to fraction form
    3,132.40/4,321.29 = 1,805.62/x
  3. Step 3: Cross multiply
    3,132.40x = 4,321.29 × 1,805.62
  4. Step 4: Simplify right side
    3,132.40x = 7,802,607.65
  5. Step 5: Solve for x
    x = 7,802,607.65/3,132.40
  6. Step 6: Final answer
    x = 2,490.94

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1.5x scale

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.