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Finding the Fourth Proportional to 247.95, 370.35 and 211.50

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Solution

The fourth proportional to 247.95, 370.35 and 211.50 is: 315.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.95 : 370.35 = 211.50 : x
  2. Step 2: Convert to fraction form
    247.95/370.35 = 211.50/x
  3. Step 3: Cross multiply
    247.95x = 370.35 × 211.50
  4. Step 4: Simplify right side
    247.95x = 78,329.03
  5. Step 5: Solve for x
    x = 78,329.03/247.95
  6. Step 6: Final answer
    x = 315.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.