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Finding the Fourth Proportional to 437.72, 655.20 and 372.11

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Solution

The fourth proportional to 437.72, 655.20 and 372.11 is: 556.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.72 : 655.20 = 372.11 : x
  2. Step 2: Convert to fraction form
    437.72/655.20 = 372.11/x
  3. Step 3: Cross multiply
    437.72x = 655.20 × 372.11
  4. Step 4: Simplify right side
    437.72x = 243,803.20
  5. Step 5: Solve for x
    x = 243,803.20/437.72
  6. Step 6: Final answer
    x = 556.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.