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Finding the Fourth Proportional to 414.16, 621.08 and 140.18

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Solution

The fourth proportional to 414.16, 621.08 and 140.18 is: 210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.16 : 621.08 = 140.18 : x
  2. Step 2: Convert to fraction form
    414.16/621.08 = 140.18/x
  3. Step 3: Cross multiply
    414.16x = 621.08 × 140.18
  4. Step 4: Simplify right side
    414.16x = 87,062.99
  5. Step 5: Solve for x
    x = 87,062.99/414.16
  6. Step 6: Final answer
    x = 210.22

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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.