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Finding the Fourth Proportional to 618.87, 926.93 and 445.02

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Solution

The fourth proportional to 618.87, 926.93 and 445.02 is: 666.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.87 : 926.93 = 445.02 : x
  2. Step 2: Convert to fraction form
    618.87/926.93 = 445.02/x
  3. Step 3: Cross multiply
    618.87x = 926.93 × 445.02
  4. Step 4: Simplify right side
    618.87x = 412,502.39
  5. Step 5: Solve for x
    x = 412,502.39/618.87
  6. Step 6: Final answer
    x = 666.54

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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.