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Finding the Fourth Proportional to 411.18, 613.08 and 403.89

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Solution

The fourth proportional to 411.18, 613.08 and 403.89 is: 602.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.18 : 613.08 = 403.89 : x
  2. Step 2: Convert to fraction form
    411.18/613.08 = 403.89/x
  3. Step 3: Cross multiply
    411.18x = 613.08 × 403.89
  4. Step 4: Simplify right side
    411.18x = 247,616.88
  5. Step 5: Solve for x
    x = 247,616.88/411.18
  6. Step 6: Final answer
    x = 602.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.