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Finding the Fourth Proportional to 401.61, 602.43 and 127.70

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Solution

The fourth proportional to 401.61, 602.43 and 127.70 is: 191.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.61 : 602.43 = 127.70 : x
  2. Step 2: Convert to fraction form
    401.61/602.43 = 127.70/x
  3. Step 3: Cross multiply
    401.61x = 602.43 × 127.70
  4. Step 4: Simplify right side
    401.61x = 76,930.31
  5. Step 5: Solve for x
    x = 76,930.31/401.61
  6. Step 6: Final answer
    x = 191.55

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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.