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Finding the Fourth Proportional to 360.49, 539.42 and 312.30

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Solution

The fourth proportional to 360.49, 539.42 and 312.30 is: 467.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.49 : 539.42 = 312.30 : x
  2. Step 2: Convert to fraction form
    360.49/539.42 = 312.30/x
  3. Step 3: Cross multiply
    360.49x = 539.42 × 312.30
  4. Step 4: Simplify right side
    360.49x = 168,463.00
  5. Step 5: Solve for x
    x = 168,463.00/360.49
  6. Step 6: Final answer
    x = 467.32

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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.