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Finding the Fourth Proportional to 460.98, 635.79 and 391.23

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Solution

The fourth proportional to 460.98, 635.79 and 391.23 is: 539.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.98 : 635.79 = 391.23 : x
  2. Step 2: Convert to fraction form
    460.98/635.79 = 391.23/x
  3. Step 3: Cross multiply
    460.98x = 635.79 × 391.23
  4. Step 4: Simplify right side
    460.98x = 248,740.12
  5. Step 5: Solve for x
    x = 248,740.12/460.98
  6. Step 6: Final answer
    x = 539.59

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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.