Home / 1,081.04-1,621.55-422.98

Finding the Fourth Proportional to 1,081.04, 1,621.55 and 422.98

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Solution

The fourth proportional to 1,081.04, 1,621.55 and 422.98 is: 634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.04 : 1,621.55 = 422.98 : x
  2. Step 2: Convert to fraction form
    1,081.04/1,621.55 = 422.98/x
  3. Step 3: Cross multiply
    1,081.04x = 1,621.55 × 422.98
  4. Step 4: Simplify right side
    1,081.04x = 685,878.64
  5. Step 5: Solve for x
    x = 685,878.64/1,081.04
  6. Step 6: Final answer
    x = 634.46

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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.