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Finding the Fourth Proportional to 414.59, 621.93 and 203.58

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Solution

The fourth proportional to 414.59, 621.93 and 203.58 is: 305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.59 : 621.93 = 203.58 : x
  2. Step 2: Convert to fraction form
    414.59/621.93 = 203.58/x
  3. Step 3: Cross multiply
    414.59x = 621.93 × 203.58
  4. Step 4: Simplify right side
    414.59x = 126,615.61
  5. Step 5: Solve for x
    x = 126,615.61/414.59
  6. Step 6: Final answer
    x = 305.40

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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.