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Finding the Fourth Proportional to 608.43, 839.68 and 346.45

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Solution

The fourth proportional to 608.43, 839.68 and 346.45 is: 478.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.43 : 839.68 = 346.45 : x
  2. Step 2: Convert to fraction form
    608.43/839.68 = 346.45/x
  3. Step 3: Cross multiply
    608.43x = 839.68 × 346.45
  4. Step 4: Simplify right side
    608.43x = 290,907.14
  5. Step 5: Solve for x
    x = 290,907.14/608.43
  6. Step 6: Final answer
    x = 478.13

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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.