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Finding the Fourth Proportional to 711.79, 982.41 and 417.17

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Solution

The fourth proportional to 711.79, 982.41 and 417.17 is: 575.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.79 : 982.41 = 417.17 : x
  2. Step 2: Convert to fraction form
    711.79/982.41 = 417.17/x
  3. Step 3: Cross multiply
    711.79x = 982.41 × 417.17
  4. Step 4: Simplify right side
    711.79x = 409,831.98
  5. Step 5: Solve for x
    x = 409,831.98/711.79
  6. Step 6: Final answer
    x = 575.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.