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Finding the Fourth Proportional to 608.61, 839.79 and 346.59

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Solution

The fourth proportional to 608.61, 839.79 and 346.59 is: 478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.61 : 839.79 = 346.59 : x
  2. Step 2: Convert to fraction form
    608.61/839.79 = 346.59/x
  3. Step 3: Cross multiply
    608.61x = 839.79 × 346.59
  4. Step 4: Simplify right side
    608.61x = 291,062.82
  5. Step 5: Solve for x
    x = 291,062.82/608.61
  6. Step 6: Final answer
    x = 478.24

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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.