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Finding the Fourth Proportional to 478.67, 717.69 and 231.74

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Solution

The fourth proportional to 478.67, 717.69 and 231.74 is: 347.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.67 : 717.69 = 231.74 : x
  2. Step 2: Convert to fraction form
    478.67/717.69 = 231.74/x
  3. Step 3: Cross multiply
    478.67x = 717.69 × 231.74
  4. Step 4: Simplify right side
    478.67x = 166,316.32
  5. Step 5: Solve for x
    x = 166,316.32/478.67
  6. Step 6: Final answer
    x = 347.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.