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Finding the Fourth Proportional to 617.78, 926.68 and 155.54

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Solution

The fourth proportional to 617.78, 926.68 and 155.54 is: 233.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.78 : 926.68 = 155.54 : x
  2. Step 2: Convert to fraction form
    617.78/926.68 = 155.54/x
  3. Step 3: Cross multiply
    617.78x = 926.68 × 155.54
  4. Step 4: Simplify right side
    617.78x = 144,135.81
  5. Step 5: Solve for x
    x = 144,135.81/617.78
  6. Step 6: Final answer
    x = 233.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.