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Finding the Fourth Proportional to 412.97, 619.31 and 207.50

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Solution

The fourth proportional to 412.97, 619.31 and 207.50 is: 311.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.97 : 619.31 = 207.50 : x
  2. Step 2: Convert to fraction form
    412.97/619.31 = 207.50/x
  3. Step 3: Cross multiply
    412.97x = 619.31 × 207.50
  4. Step 4: Simplify right side
    412.97x = 128,504.25
  5. Step 5: Solve for x
    x = 128,504.25/412.97
  6. Step 6: Final answer
    x = 311.17

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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.