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Finding the Fourth Proportional to 540.72, 746.64 and 400.68

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Solution

The fourth proportional to 540.72, 746.64 and 400.68 is: 553.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.72 : 746.64 = 400.68 : x
  2. Step 2: Convert to fraction form
    540.72/746.64 = 400.68/x
  3. Step 3: Cross multiply
    540.72x = 746.64 × 400.68
  4. Step 4: Simplify right side
    540.72x = 299,163.72
  5. Step 5: Solve for x
    x = 299,163.72/540.72
  6. Step 6: Final answer
    x = 553.27

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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.