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Finding the Fourth Proportional to 343.86, 476.99 and 330.90

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Solution

The fourth proportional to 343.86, 476.99 and 330.90 is: 459.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.86 : 476.99 = 330.90 : x
  2. Step 2: Convert to fraction form
    343.86/476.99 = 330.90/x
  3. Step 3: Cross multiply
    343.86x = 476.99 × 330.90
  4. Step 4: Simplify right side
    343.86x = 157,834.34
  5. Step 5: Solve for x
    x = 157,834.34/343.86
  6. Step 6: Final answer
    x = 459.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.