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Finding the Fourth Proportional to 411.93, 616.68 and 320.31

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Solution

The fourth proportional to 411.93, 616.68 and 320.31 is: 479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.93 : 616.68 = 320.31 : x
  2. Step 2: Convert to fraction form
    411.93/616.68 = 320.31/x
  3. Step 3: Cross multiply
    411.93x = 616.68 × 320.31
  4. Step 4: Simplify right side
    411.93x = 197,528.77
  5. Step 5: Solve for x
    x = 197,528.77/411.93
  6. Step 6: Final answer
    x = 479.52

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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.