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Finding the Fourth Proportional to 400.15, 600.23 and 319.15

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Solution

The fourth proportional to 400.15, 600.23 and 319.15 is: 478.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.15 : 600.23 = 319.15 : x
  2. Step 2: Convert to fraction form
    400.15/600.23 = 319.15/x
  3. Step 3: Cross multiply
    400.15x = 600.23 × 319.15
  4. Step 4: Simplify right side
    400.15x = 191,563.40
  5. Step 5: Solve for x
    x = 191,563.40/400.15
  6. Step 6: Final answer
    x = 478.73

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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.