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Finding the Fourth Proportional to 478.23, 716.27 and 409.89

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Solution

The fourth proportional to 478.23, 716.27 and 409.89 is: 613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.23 : 716.27 = 409.89 : x
  2. Step 2: Convert to fraction form
    478.23/716.27 = 409.89/x
  3. Step 3: Cross multiply
    478.23x = 716.27 × 409.89
  4. Step 4: Simplify right side
    478.23x = 293,589.86
  5. Step 5: Solve for x
    x = 293,589.86/478.23
  6. Step 6: Final answer
    x = 613.91

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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.