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Finding the Fourth Proportional to 539.88, 806.40 and 462.48

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Solution

The fourth proportional to 539.88, 806.40 and 462.48 is: 690.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.88 : 806.40 = 462.48 : x
  2. Step 2: Convert to fraction form
    539.88/806.40 = 462.48/x
  3. Step 3: Cross multiply
    539.88x = 806.40 × 462.48
  4. Step 4: Simplify right side
    539.88x = 372,943.87
  5. Step 5: Solve for x
    x = 372,943.87/539.88
  6. Step 6: Final answer
    x = 690.79

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Double scale
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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.