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Finding the Fourth Proportional to 547.72, 756.12 and 401.50

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Solution

The fourth proportional to 547.72, 756.12 and 401.50 is: 554.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.72 : 756.12 = 401.50 : x
  2. Step 2: Convert to fraction form
    547.72/756.12 = 401.50/x
  3. Step 3: Cross multiply
    547.72x = 756.12 × 401.50
  4. Step 4: Simplify right side
    547.72x = 303,582.18
  5. Step 5: Solve for x
    x = 303,582.18/547.72
  6. Step 6: Final answer
    x = 554.27

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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.