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Finding the Fourth Proportional to 638.71, 958.47 and 364.99

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Solution

The fourth proportional to 638.71, 958.47 and 364.99 is: 547.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.71 : 958.47 = 364.99 : x
  2. Step 2: Convert to fraction form
    638.71/958.47 = 364.99/x
  3. Step 3: Cross multiply
    638.71x = 958.47 × 364.99
  4. Step 4: Simplify right side
    638.71x = 349,831.97
  5. Step 5: Solve for x
    x = 349,831.97/638.71
  6. Step 6: Final answer
    x = 547.72

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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.