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Finding the Fourth Proportional to 547.20, 755.28 and 400.32

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Solution

The fourth proportional to 547.20, 755.28 and 400.32 is: 552.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.20 : 755.28 = 400.32 : x
  2. Step 2: Convert to fraction form
    547.20/755.28 = 400.32/x
  3. Step 3: Cross multiply
    547.20x = 755.28 × 400.32
  4. Step 4: Simplify right side
    547.20x = 302,353.69
  5. Step 5: Solve for x
    x = 302,353.69/547.20
  6. Step 6: Final answer
    x = 552.55

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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.