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Finding the Fourth Proportional to 638.14, 956.43 and 291.00

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Solution

The fourth proportional to 638.14, 956.43 and 291.00 is: 436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.14 : 956.43 = 291.00 : x
  2. Step 2: Convert to fraction form
    638.14/956.43 = 291.00/x
  3. Step 3: Cross multiply
    638.14x = 956.43 × 291.00
  4. Step 4: Simplify right side
    638.14x = 278,318.63
  5. Step 5: Solve for x
    x = 278,318.63/638.14
  6. Step 6: Final answer
    x = 436.14

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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.