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Finding the Fourth Proportional to 401.45, 553.85 and 235.67

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Solution

The fourth proportional to 401.45, 553.85 and 235.67 is: 325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.45 : 553.85 = 235.67 : x
  2. Step 2: Convert to fraction form
    401.45/553.85 = 235.67/x
  3. Step 3: Cross multiply
    401.45x = 553.85 × 235.67
  4. Step 4: Simplify right side
    401.45x = 130,521.88
  5. Step 5: Solve for x
    x = 130,521.88/401.45
  6. Step 6: Final answer
    x = 325.13

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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.