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Finding the Fourth Proportional to 360.32, 539.70 and 215.72

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Solution

The fourth proportional to 360.32, 539.70 and 215.72 is: 323.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.32 : 539.70 = 215.72 : x
  2. Step 2: Convert to fraction form
    360.32/539.70 = 215.72/x
  3. Step 3: Cross multiply
    360.32x = 539.70 × 215.72
  4. Step 4: Simplify right side
    360.32x = 116,424.08
  5. Step 5: Solve for x
    x = 116,424.08/360.32
  6. Step 6: Final answer
    x = 323.11

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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.