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Finding the Fourth Proportional to 618.61, 927.60 and 207.60

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Solution

The fourth proportional to 618.61, 927.60 and 207.60 is: 311.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.61 : 927.60 = 207.60 : x
  2. Step 2: Convert to fraction form
    618.61/927.60 = 207.60/x
  3. Step 3: Cross multiply
    618.61x = 927.60 × 207.60
  4. Step 4: Simplify right side
    618.61x = 192,569.76
  5. Step 5: Solve for x
    x = 192,569.76/618.61
  6. Step 6: Final answer
    x = 311.29

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1.5x scale

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.