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Finding the Fourth Proportional to 401.56, 554.16 and 235.90

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Solution

The fourth proportional to 401.56, 554.16 and 235.90 is: 325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.56 : 554.16 = 235.90 : x
  2. Step 2: Convert to fraction form
    401.56/554.16 = 235.90/x
  3. Step 3: Cross multiply
    401.56x = 554.16 × 235.90
  4. Step 4: Simplify right side
    401.56x = 130,726.34
  5. Step 5: Solve for x
    x = 130,726.34/401.56
  6. Step 6: Final answer
    x = 325.55

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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.