Home / 1,081.88-1,623.59-432.60

Finding the Fourth Proportional to 1,081.88, 1,623.59 and 432.60

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Solution

The fourth proportional to 1,081.88, 1,623.59 and 432.60 is: 649.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.88 : 1,623.59 = 432.60 : x
  2. Step 2: Convert to fraction form
    1,081.88/1,623.59 = 432.60/x
  3. Step 3: Cross multiply
    1,081.88x = 1,623.59 × 432.60
  4. Step 4: Simplify right side
    1,081.88x = 702,365.03
  5. Step 5: Solve for x
    x = 702,365.03/1,081.88
  6. Step 6: Final answer
    x = 649.21

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Double scale
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1.5x scale

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.