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Finding the Fourth Proportional to 411.42, 615.90 and 228.57

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Solution

The fourth proportional to 411.42, 615.90 and 228.57 is: 342.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.42 : 615.90 = 228.57 : x
  2. Step 2: Convert to fraction form
    411.42/615.90 = 228.57/x
  3. Step 3: Cross multiply
    411.42x = 615.90 × 228.57
  4. Step 4: Simplify right side
    411.42x = 140,776.26
  5. Step 5: Solve for x
    x = 140,776.26/411.42
  6. Step 6: Final answer
    x = 342.17

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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.