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Finding the Fourth Proportional to 372,168, 513,576.20 and 211,033.90

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Solution

The fourth proportional to 372,168, 513,576.20 and 211,033.90 is: 291,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,168 : 513,576.20 = 211,033.90 : x
  2. Step 2: Convert to fraction form
    372,168/513,576.20 = 211,033.90/x
  3. Step 3: Cross multiply
    372,168x = 513,576.20 × 211,033.90
  4. Step 4: Simplify right side
    372,168x = 108,381,988,433.18
  5. Step 5: Solve for x
    x = 108,381,988,433.18/372,168
  6. Step 6: Final answer
    x = 291,217.91

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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.