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Finding the Fourth Proportional to 608.80, 840.13 and 346.80

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Solution

The fourth proportional to 608.80, 840.13 and 346.80 is: 478.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.80 : 840.13 = 346.80 : x
  2. Step 2: Convert to fraction form
    608.80/840.13 = 346.80/x
  3. Step 3: Cross multiply
    608.80x = 840.13 × 346.80
  4. Step 4: Simplify right side
    608.80x = 291,357.08
  5. Step 5: Solve for x
    x = 291,357.08/608.80
  6. Step 6: Final answer
    x = 478.58

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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.