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Finding the Fourth Proportional to 715.67, 1,073.33 and 228.62

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Solution

The fourth proportional to 715.67, 1,073.33 and 228.62 is: 342.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.67 : 1,073.33 = 228.62 : x
  2. Step 2: Convert to fraction form
    715.67/1,073.33 = 228.62/x
  3. Step 3: Cross multiply
    715.67x = 1,073.33 × 228.62
  4. Step 4: Simplify right side
    715.67x = 245,384.70
  5. Step 5: Solve for x
    x = 245,384.70/715.67
  6. Step 6: Final answer
    x = 342.87

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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.