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Finding the Fourth Proportional to 401.07, 601.69 and 123.40

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Solution

The fourth proportional to 401.07, 601.69 and 123.40 is: 185.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.07 : 601.69 = 123.40 : x
  2. Step 2: Convert to fraction form
    401.07/601.69 = 123.40/x
  3. Step 3: Cross multiply
    401.07x = 601.69 × 123.40
  4. Step 4: Simplify right side
    401.07x = 74,248.55
  5. Step 5: Solve for x
    x = 74,248.55/401.07
  6. Step 6: Final answer
    x = 185.13

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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.