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Finding the Fourth Proportional to 586.36, 879.34 and 261.15

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Solution

The fourth proportional to 586.36, 879.34 and 261.15 is: 391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.36 : 879.34 = 261.15 : x
  2. Step 2: Convert to fraction form
    586.36/879.34 = 261.15/x
  3. Step 3: Cross multiply
    586.36x = 879.34 × 261.15
  4. Step 4: Simplify right side
    586.36x = 229,639.64
  5. Step 5: Solve for x
    x = 229,639.64/586.36
  6. Step 6: Final answer
    x = 391.64

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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.