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Finding the Fourth Proportional to 581.97, 872.18 and 427.17

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Solution

The fourth proportional to 581.97, 872.18 and 427.17 is: 640.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.97 : 872.18 = 427.17 : x
  2. Step 2: Convert to fraction form
    581.97/872.18 = 427.17/x
  3. Step 3: Cross multiply
    581.97x = 872.18 × 427.17
  4. Step 4: Simplify right side
    581.97x = 372,563.72
  5. Step 5: Solve for x
    x = 372,563.72/581.97
  6. Step 6: Final answer
    x = 640.18

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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.