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Finding the Fourth Proportional to 372,112.60, 558,168.90 and 214,211.20

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Solution

The fourth proportional to 372,112.60, 558,168.90 and 214,211.20 is: 321,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,112.60 : 558,168.90 = 214,211.20 : x
  2. Step 2: Convert to fraction form
    372,112.60/558,168.90 = 214,211.20/x
  3. Step 3: Cross multiply
    372,112.60x = 558,168.90 × 214,211.20
  4. Step 4: Simplify right side
    372,112.60x = 119,566,029,871.68
  5. Step 5: Solve for x
    x = 119,566,029,871.68/372,112.60
  6. Step 6: Final answer
    x = 321,316.80

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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.