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Finding the Fourth Proportional to 715.33, 1,073.18 and 228.39

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Solution

The fourth proportional to 715.33, 1,073.18 and 228.39 is: 342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.33 : 1,073.18 = 228.39 : x
  2. Step 2: Convert to fraction form
    715.33/1,073.18 = 228.39/x
  3. Step 3: Cross multiply
    715.33x = 1,073.18 × 228.39
  4. Step 4: Simplify right side
    715.33x = 245,103.58
  5. Step 5: Solve for x
    x = 245,103.58/715.33
  6. Step 6: Final answer
    x = 342.64

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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.