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Finding the Fourth Proportional to 2,121.93, 3,182.28 and 641.10

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Solution

The fourth proportional to 2,121.93, 3,182.28 and 641.10 is: 961.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.93 : 3,182.28 = 641.10 : x
  2. Step 2: Convert to fraction form
    2,121.93/3,182.28 = 641.10/x
  3. Step 3: Cross multiply
    2,121.93x = 3,182.28 × 641.10
  4. Step 4: Simplify right side
    2,121.93x = 2,040,159.71
  5. Step 5: Solve for x
    x = 2,040,159.71/2,121.93
  6. Step 6: Final answer
    x = 961.46

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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.