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Finding the Fourth Proportional to 315.18, 472.59 and 229.50

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Solution

The fourth proportional to 315.18, 472.59 and 229.50 is: 344.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.18 : 472.59 = 229.50 : x
  2. Step 2: Convert to fraction form
    315.18/472.59 = 229.50/x
  3. Step 3: Cross multiply
    315.18x = 472.59 × 229.50
  4. Step 4: Simplify right side
    315.18x = 108,459.41
  5. Step 5: Solve for x
    x = 108,459.41/315.18
  6. Step 6: Final answer
    x = 344.12

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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.