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Finding the Fourth Proportional to 414.12, 621.24 and 392.28

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Solution

The fourth proportional to 414.12, 621.24 and 392.28 is: 588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.12 : 621.24 = 392.28 : x
  2. Step 2: Convert to fraction form
    414.12/621.24 = 392.28/x
  3. Step 3: Cross multiply
    414.12x = 621.24 × 392.28
  4. Step 4: Simplify right side
    414.12x = 243,700.03
  5. Step 5: Solve for x
    x = 243,700.03/414.12
  6. Step 6: Final answer
    x = 588.48

Related Problems

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Double scale
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Similar ratio
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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.