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Finding the Fourth Proportional to 638.39, 957.65 and 176.17

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Solution

The fourth proportional to 638.39, 957.65 and 176.17 is: 264.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.39 : 957.65 = 176.17 : x
  2. Step 2: Convert to fraction form
    638.39/957.65 = 176.17/x
  3. Step 3: Cross multiply
    638.39x = 957.65 × 176.17
  4. Step 4: Simplify right side
    638.39x = 168,703.53
  5. Step 5: Solve for x
    x = 168,703.53/638.39
  6. Step 6: Final answer
    x = 264.27

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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.