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Finding the Fourth Proportional to 372,890.20, 559,408.20 and 148,212.40

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Solution

The fourth proportional to 372,890.20, 559,408.20 and 148,212.40 is: 222,347.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,890.20 : 559,408.20 = 148,212.40 : x
  2. Step 2: Convert to fraction form
    372,890.20/559,408.20 = 148,212.40/x
  3. Step 3: Cross multiply
    372,890.20x = 559,408.20 × 148,212.40
  4. Step 4: Simplify right side
    372,890.20x = 82,911,231,901.68
  5. Step 5: Solve for x
    x = 82,911,231,901.68/372,890.20
  6. Step 6: Final answer
    x = 222,347.58

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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.