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Finding the Fourth Proportional to 638.08, 956.58 and 253.24

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Solution

The fourth proportional to 638.08, 956.58 and 253.24 is: 379.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.08 : 956.58 = 253.24 : x
  2. Step 2: Convert to fraction form
    638.08/956.58 = 253.24/x
  3. Step 3: Cross multiply
    638.08x = 956.58 × 253.24
  4. Step 4: Simplify right side
    638.08x = 242,244.32
  5. Step 5: Solve for x
    x = 242,244.32/638.08
  6. Step 6: Final answer
    x = 379.65

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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.