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Finding the Fourth Proportional to 586.47, 879.09 and 261.80

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Solution

The fourth proportional to 586.47, 879.09 and 261.80 is: 392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.47 : 879.09 = 261.80 : x
  2. Step 2: Convert to fraction form
    586.47/879.09 = 261.80/x
  3. Step 3: Cross multiply
    586.47x = 879.09 × 261.80
  4. Step 4: Simplify right side
    586.47x = 230,141.37
  5. Step 5: Solve for x
    x = 230,141.37/586.47
  6. Step 6: Final answer
    x = 392.42

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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.