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Finding the Fourth Proportional to 401.39, 601.93 and 206.32

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Solution

The fourth proportional to 401.39, 601.93 and 206.32 is: 309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.39 : 601.93 = 206.32 : x
  2. Step 2: Convert to fraction form
    401.39/601.93 = 206.32/x
  3. Step 3: Cross multiply
    401.39x = 601.93 × 206.32
  4. Step 4: Simplify right side
    401.39x = 124,190.20
  5. Step 5: Solve for x
    x = 124,190.20/401.39
  6. Step 6: Final answer
    x = 309.40

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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.