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Finding the Fourth Proportional to 401.74, 602.21 and 185.47

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Solution

The fourth proportional to 401.74, 602.21 and 185.47 is: 278.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.74 : 602.21 = 185.47 : x
  2. Step 2: Convert to fraction form
    401.74/602.21 = 185.47/x
  3. Step 3: Cross multiply
    401.74x = 602.21 × 185.47
  4. Step 4: Simplify right side
    401.74x = 111,690.96
  5. Step 5: Solve for x
    x = 111,690.96/401.74
  6. Step 6: Final answer
    x = 278.02

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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.