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Finding the Fourth Proportional to 618.87, 854.18 and 383.03

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Solution

The fourth proportional to 618.87, 854.18 and 383.03 is: 528.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.87 : 854.18 = 383.03 : x
  2. Step 2: Convert to fraction form
    618.87/854.18 = 383.03/x
  3. Step 3: Cross multiply
    618.87x = 854.18 × 383.03
  4. Step 4: Simplify right side
    618.87x = 327,170.38
  5. Step 5: Solve for x
    x = 327,170.38/618.87
  6. Step 6: Final answer
    x = 528.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.