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Finding the Fourth Proportional to 401.80, 553.72 and 377.52

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Solution

The fourth proportional to 401.80, 553.72 and 377.52 is: 520.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.80 : 553.72 = 377.52 : x
  2. Step 2: Convert to fraction form
    401.80/553.72 = 377.52/x
  3. Step 3: Cross multiply
    401.80x = 553.72 × 377.52
  4. Step 4: Simplify right side
    401.80x = 209,040.37
  5. Step 5: Solve for x
    x = 209,040.37/401.80
  6. Step 6: Final answer
    x = 520.26

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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.