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Finding the Fourth Proportional to 385.59, 532.18 and 228.23

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Solution

The fourth proportional to 385.59, 532.18 and 228.23 is: 314.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.59 : 532.18 = 228.23 : x
  2. Step 2: Convert to fraction form
    385.59/532.18 = 228.23/x
  3. Step 3: Cross multiply
    385.59x = 532.18 × 228.23
  4. Step 4: Simplify right side
    385.59x = 121,455.64
  5. Step 5: Solve for x
    x = 121,455.64/385.59
  6. Step 6: Final answer
    x = 314.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.