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Finding the Fourth Proportional to 576.17, 864.77 and 390.62

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Solution

The fourth proportional to 576.17, 864.77 and 390.62 is: 586.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.17 : 864.77 = 390.62 : x
  2. Step 2: Convert to fraction form
    576.17/864.77 = 390.62/x
  3. Step 3: Cross multiply
    576.17x = 864.77 × 390.62
  4. Step 4: Simplify right side
    576.17x = 337,795.97
  5. Step 5: Solve for x
    x = 337,795.97/576.17
  6. Step 6: Final answer
    x = 586.28

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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.