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Finding the Fourth Proportional to 401.18, 599.22 and 319.77

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Solution

The fourth proportional to 401.18, 599.22 and 319.77 is: 477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.18 : 599.22 = 319.77 : x
  2. Step 2: Convert to fraction form
    401.18/599.22 = 319.77/x
  3. Step 3: Cross multiply
    401.18x = 599.22 × 319.77
  4. Step 4: Simplify right side
    401.18x = 191,612.58
  5. Step 5: Solve for x
    x = 191,612.58/401.18
  6. Step 6: Final answer
    x = 477.63

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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.