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Finding the Fourth Proportional to 586.30, 878.56 and 439.35

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Solution

The fourth proportional to 586.30, 878.56 and 439.35 is: 658.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.30 : 878.56 = 439.35 : x
  2. Step 2: Convert to fraction form
    586.30/878.56 = 439.35/x
  3. Step 3: Cross multiply
    586.30x = 878.56 × 439.35
  4. Step 4: Simplify right side
    586.30x = 385,995.34
  5. Step 5: Solve for x
    x = 385,995.34/586.30
  6. Step 6: Final answer
    x = 658.36

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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.