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Finding the Fourth Proportional to 406.24, 560.87 and 312.82

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Solution

The fourth proportional to 406.24, 560.87 and 312.82 is: 431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.24 : 560.87 = 312.82 : x
  2. Step 2: Convert to fraction form
    406.24/560.87 = 312.82/x
  3. Step 3: Cross multiply
    406.24x = 560.87 × 312.82
  4. Step 4: Simplify right side
    406.24x = 175,450.73
  5. Step 5: Solve for x
    x = 175,450.73/406.24
  6. Step 6: Final answer
    x = 431.89

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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.