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Finding the Fourth Proportional to 617.39, 919.87 and 608.48

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Solution

The fourth proportional to 617.39, 919.87 and 608.48 is: 906.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.39 : 919.87 = 608.48 : x
  2. Step 2: Convert to fraction form
    617.39/919.87 = 608.48/x
  3. Step 3: Cross multiply
    617.39x = 919.87 × 608.48
  4. Step 4: Simplify right side
    617.39x = 559,718.68
  5. Step 5: Solve for x
    x = 559,718.68/617.39
  6. Step 6: Final answer
    x = 906.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.