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Finding the Fourth Proportional to 581.14, 872.31 and 427.24

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Solution

The fourth proportional to 581.14, 872.31 and 427.24 is: 641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.14 : 872.31 = 427.24 : x
  2. Step 2: Convert to fraction form
    581.14/872.31 = 427.24/x
  3. Step 3: Cross multiply
    581.14x = 872.31 × 427.24
  4. Step 4: Simplify right side
    581.14x = 372,681.36
  5. Step 5: Solve for x
    x = 372,681.36/581.14
  6. Step 6: Final answer
    x = 641.30

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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.