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Finding the Fourth Proportional to 608.70, 839.80 and 346.66

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Solution

The fourth proportional to 608.70, 839.80 and 346.66 is: 478.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.70 : 839.80 = 346.66 : x
  2. Step 2: Convert to fraction form
    608.70/839.80 = 346.66/x
  3. Step 3: Cross multiply
    608.70x = 839.80 × 346.66
  4. Step 4: Simplify right side
    608.70x = 291,125.07
  5. Step 5: Solve for x
    x = 291,125.07/608.70
  6. Step 6: Final answer
    x = 478.27

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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.