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Finding the Fourth Proportional to 478.31, 659.99 and 268.48

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Solution

The fourth proportional to 478.31, 659.99 and 268.48 is: 370.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.31 : 659.99 = 268.48 : x
  2. Step 2: Convert to fraction form
    478.31/659.99 = 268.48/x
  3. Step 3: Cross multiply
    478.31x = 659.99 × 268.48
  4. Step 4: Simplify right side
    478.31x = 177,194.12
  5. Step 5: Solve for x
    x = 177,194.12/478.31
  6. Step 6: Final answer
    x = 370.46

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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.