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Finding the Fourth Proportional to 618.50, 927.65 and 207.50

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Solution

The fourth proportional to 618.50, 927.65 and 207.50 is: 311.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.50 : 927.65 = 207.50 : x
  2. Step 2: Convert to fraction form
    618.50/927.65 = 207.50/x
  3. Step 3: Cross multiply
    618.50x = 927.65 × 207.50
  4. Step 4: Simplify right side
    618.50x = 192,483.26
  5. Step 5: Solve for x
    x = 192,483.26/618.50
  6. Step 6: Final answer
    x = 311.21

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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.