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Finding the Fourth Proportional to 617.96, 926.40 and 401.60

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Solution

The fourth proportional to 617.96, 926.40 and 401.60 is: 602.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.96 : 926.40 = 401.60 : x
  2. Step 2: Convert to fraction form
    617.96/926.40 = 401.60/x
  3. Step 3: Cross multiply
    617.96x = 926.40 × 401.60
  4. Step 4: Simplify right side
    617.96x = 372,042.24
  5. Step 5: Solve for x
    x = 372,042.24/617.96
  6. Step 6: Final answer
    x = 602.05

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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.