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Finding the Fourth Proportional to 417.81, 626.79 and 235.31

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Solution

The fourth proportional to 417.81, 626.79 and 235.31 is: 353.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.81 : 626.79 = 235.31 : x
  2. Step 2: Convert to fraction form
    417.81/626.79 = 235.31/x
  3. Step 3: Cross multiply
    417.81x = 626.79 × 235.31
  4. Step 4: Simplify right side
    417.81x = 147,486.38
  5. Step 5: Solve for x
    x = 147,486.38/417.81
  6. Step 6: Final answer
    x = 353.00

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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.