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Finding the Fourth Proportional to 400.66, 599.34 and 319.66

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Solution

The fourth proportional to 400.66, 599.34 and 319.66 is: 478.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.66 : 599.34 = 319.66 : x
  2. Step 2: Convert to fraction form
    400.66/599.34 = 319.66/x
  3. Step 3: Cross multiply
    400.66x = 599.34 × 319.66
  4. Step 4: Simplify right side
    400.66x = 191,585.02
  5. Step 5: Solve for x
    x = 191,585.02/400.66
  6. Step 6: Final answer
    x = 478.17

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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.