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Finding the Fourth Proportional to 360.80, 540.48 and 339.20

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Solution

The fourth proportional to 360.80, 540.48 and 339.20 is: 508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.80 : 540.48 = 339.20 : x
  2. Step 2: Convert to fraction form
    360.80/540.48 = 339.20/x
  3. Step 3: Cross multiply
    360.80x = 540.48 × 339.20
  4. Step 4: Simplify right side
    360.80x = 183,330.82
  5. Step 5: Solve for x
    x = 183,330.82/360.80
  6. Step 6: Final answer
    x = 508.12

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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.