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Finding the Fourth Proportional to 608.43, 839.79 and 346.53

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Solution

The fourth proportional to 608.43, 839.79 and 346.53 is: 478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.43 : 839.79 = 346.53 : x
  2. Step 2: Convert to fraction form
    608.43/839.79 = 346.53/x
  3. Step 3: Cross multiply
    608.43x = 839.79 × 346.53
  4. Step 4: Simplify right side
    608.43x = 291,012.43
  5. Step 5: Solve for x
    x = 291,012.43/608.43
  6. Step 6: Final answer
    x = 478.30

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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.