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Finding the Fourth Proportional to 401.98, 556.05 and 336.28

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Solution

The fourth proportional to 401.98, 556.05 and 336.28 is: 465.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.98 : 556.05 = 336.28 : x
  2. Step 2: Convert to fraction form
    401.98/556.05 = 336.28/x
  3. Step 3: Cross multiply
    401.98x = 556.05 × 336.28
  4. Step 4: Simplify right side
    401.98x = 186,988.49
  5. Step 5: Solve for x
    x = 186,988.49/401.98
  6. Step 6: Final answer
    x = 465.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.