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Finding the Fourth Proportional to 401.67, 602.49 and 127.77

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Solution

The fourth proportional to 401.67, 602.49 and 127.77 is: 191.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.67 : 602.49 = 127.77 : x
  2. Step 2: Convert to fraction form
    401.67/602.49 = 127.77/x
  3. Step 3: Cross multiply
    401.67x = 602.49 × 127.77
  4. Step 4: Simplify right side
    401.67x = 76,981.65
  5. Step 5: Solve for x
    x = 76,981.65/401.67
  6. Step 6: Final answer
    x = 191.66

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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.