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Finding the Fourth Proportional to 586.43, 879.68 and 261.82

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Solution

The fourth proportional to 586.43, 879.68 and 261.82 is: 392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.43 : 879.68 = 261.82 : x
  2. Step 2: Convert to fraction form
    586.43/879.68 = 261.82/x
  3. Step 3: Cross multiply
    586.43x = 879.68 × 261.82
  4. Step 4: Simplify right side
    586.43x = 230,316.51
  5. Step 5: Solve for x
    x = 230,316.51/586.43
  6. Step 6: Final answer
    x = 392.74

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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.