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Finding the Fourth Proportional to 608.15, 839.43 and 346.34

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Solution

The fourth proportional to 608.15, 839.43 and 346.34 is: 478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.15 : 839.43 = 346.34 : x
  2. Step 2: Convert to fraction form
    608.15/839.43 = 346.34/x
  3. Step 3: Cross multiply
    608.15x = 839.43 × 346.34
  4. Step 4: Simplify right side
    608.15x = 290,723.99
  5. Step 5: Solve for x
    x = 290,723.99/608.15
  6. Step 6: Final answer
    x = 478.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.