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Finding the Fourth Proportional to 372,938.70, 559,408.05 and 215,474.70

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Solution

The fourth proportional to 372,938.70, 559,408.05 and 215,474.70 is: 323,212.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,938.70 : 559,408.05 = 215,474.70 : x
  2. Step 2: Convert to fraction form
    372,938.70/559,408.05 = 215,474.70/x
  3. Step 3: Cross multiply
    372,938.70x = 559,408.05 × 215,474.70
  4. Step 4: Simplify right side
    372,938.70x = 120,538,281,751.34
  5. Step 5: Solve for x
    x = 120,538,281,751.34/372,938.70
  6. Step 6: Final answer
    x = 323,212.05

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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.