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Finding the Fourth Proportional to 370.72, 555.12 and 255.52

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Solution

The fourth proportional to 370.72, 555.12 and 255.52 is: 382.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.72 : 555.12 = 255.52 : x
  2. Step 2: Convert to fraction form
    370.72/555.12 = 255.52/x
  3. Step 3: Cross multiply
    370.72x = 555.12 × 255.52
  4. Step 4: Simplify right side
    370.72x = 141,844.26
  5. Step 5: Solve for x
    x = 141,844.26/370.72
  6. Step 6: Final answer
    x = 382.62

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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.