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Finding the Fourth Proportional to 401.79, 554.40 and 236.06

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Solution

The fourth proportional to 401.79, 554.40 and 236.06 is: 325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.79 : 554.40 = 236.06 : x
  2. Step 2: Convert to fraction form
    401.79/554.40 = 236.06/x
  3. Step 3: Cross multiply
    401.79x = 554.40 × 236.06
  4. Step 4: Simplify right side
    401.79x = 130,870.97
  5. Step 5: Solve for x
    x = 130,870.97/401.79
  6. Step 6: Final answer
    x = 325.72

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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.