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Finding the Fourth Proportional to 608.57, 839.70 and 359.90

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Solution

The fourth proportional to 608.57, 839.70 and 359.90 is: 496.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.57 : 839.70 = 359.90 : x
  2. Step 2: Convert to fraction form
    608.57/839.70 = 359.90/x
  3. Step 3: Cross multiply
    608.57x = 839.70 × 359.90
  4. Step 4: Simplify right side
    608.57x = 302,203.83
  5. Step 5: Solve for x
    x = 302,203.83/608.57
  6. Step 6: Final answer
    x = 496.58

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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.