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Finding the Fourth Proportional to 711.17, 981.28 and 416.43

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Solution

The fourth proportional to 711.17, 981.28 and 416.43 is: 574.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.17 : 981.28 = 416.43 : x
  2. Step 2: Convert to fraction form
    711.17/981.28 = 416.43/x
  3. Step 3: Cross multiply
    711.17x = 981.28 × 416.43
  4. Step 4: Simplify right side
    711.17x = 408,634.43
  5. Step 5: Solve for x
    x = 408,634.43/711.17
  6. Step 6: Final answer
    x = 574.59

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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.