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Finding the Fourth Proportional to 618.03, 855.12 and 539.53

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Solution

The fourth proportional to 618.03, 855.12 and 539.53 is: 746.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.03 : 855.12 = 539.53 : x
  2. Step 2: Convert to fraction form
    618.03/855.12 = 539.53/x
  3. Step 3: Cross multiply
    618.03x = 855.12 × 539.53
  4. Step 4: Simplify right side
    618.03x = 461,362.78
  5. Step 5: Solve for x
    x = 461,362.78/618.03
  6. Step 6: Final answer
    x = 746.51

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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.