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Finding the Fourth Proportional to 478.87, 718.12 and 247.89

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Solution

The fourth proportional to 478.87, 718.12 and 247.89 is: 371.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.87 : 718.12 = 247.89 : x
  2. Step 2: Convert to fraction form
    478.87/718.12 = 247.89/x
  3. Step 3: Cross multiply
    478.87x = 718.12 × 247.89
  4. Step 4: Simplify right side
    478.87x = 178,014.77
  5. Step 5: Solve for x
    x = 178,014.77/478.87
  6. Step 6: Final answer
    x = 371.74

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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.