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Finding the Fourth Proportional to 1,221.95, 1,832.24 and 400.01

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Solution

The fourth proportional to 1,221.95, 1,832.24 and 400.01 is: 599.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.95 : 1,832.24 = 400.01 : x
  2. Step 2: Convert to fraction form
    1,221.95/1,832.24 = 400.01/x
  3. Step 3: Cross multiply
    1,221.95x = 1,832.24 × 400.01
  4. Step 4: Simplify right side
    1,221.95x = 732,906.16
  5. Step 5: Solve for x
    x = 732,906.16/1,221.95
  6. Step 6: Final answer
    x = 599.78

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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.