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Finding the Fourth Proportional to 586.80, 879.44 and 261.76

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Solution

The fourth proportional to 586.80, 879.44 and 261.76 is: 392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.80 : 879.44 = 261.76 : x
  2. Step 2: Convert to fraction form
    586.80/879.44 = 261.76/x
  3. Step 3: Cross multiply
    586.80x = 879.44 × 261.76
  4. Step 4: Simplify right side
    586.80x = 230,202.21
  5. Step 5: Solve for x
    x = 230,202.21/586.80
  6. Step 6: Final answer
    x = 392.30

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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.