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Finding the Fourth Proportional to 618.72, 923.70 and 481.02

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Solution

The fourth proportional to 618.72, 923.70 and 481.02 is: 718.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.72 : 923.70 = 481.02 : x
  2. Step 2: Convert to fraction form
    618.72/923.70 = 481.02/x
  3. Step 3: Cross multiply
    618.72x = 923.70 × 481.02
  4. Step 4: Simplify right side
    618.72x = 444,318.17
  5. Step 5: Solve for x
    x = 444,318.17/618.72
  6. Step 6: Final answer
    x = 718.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.