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Finding the Fourth Proportional to 576.16, 865.05 and 393.10

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Solution

The fourth proportional to 576.16, 865.05 and 393.10 is: 590.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.16 : 865.05 = 393.10 : x
  2. Step 2: Convert to fraction form
    576.16/865.05 = 393.10/x
  3. Step 3: Cross multiply
    576.16x = 865.05 × 393.10
  4. Step 4: Simplify right side
    576.16x = 340,051.16
  5. Step 5: Solve for x
    x = 340,051.16/576.16
  6. Step 6: Final answer
    x = 590.20

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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.