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Finding the Fourth Proportional to 360.16, 539.80 and 143.60

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Solution

The fourth proportional to 360.16, 539.80 and 143.60 is: 215.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.16 : 539.80 = 143.60 : x
  2. Step 2: Convert to fraction form
    360.16/539.80 = 143.60/x
  3. Step 3: Cross multiply
    360.16x = 539.80 × 143.60
  4. Step 4: Simplify right side
    360.16x = 77,515.28
  5. Step 5: Solve for x
    x = 77,515.28/360.16
  6. Step 6: Final answer
    x = 215.22

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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.