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Finding the Fourth Proportional to 409.67, 613.55 and 384.29

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Solution

The fourth proportional to 409.67, 613.55 and 384.29 is: 575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.67 : 613.55 = 384.29 : x
  2. Step 2: Convert to fraction form
    409.67/613.55 = 384.29/x
  3. Step 3: Cross multiply
    409.67x = 613.55 × 384.29
  4. Step 4: Simplify right side
    409.67x = 235,781.13
  5. Step 5: Solve for x
    x = 235,781.13/409.67
  6. Step 6: Final answer
    x = 575.54

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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.