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Finding the Fourth Proportional to 259,470.60, 389,205.90 and 141,372.60

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Solution

The fourth proportional to 259,470.60, 389,205.90 and 141,372.60 is: 212,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,470.60 : 389,205.90 = 141,372.60 : x
  2. Step 2: Convert to fraction form
    259,470.60/389,205.90 = 141,372.60/x
  3. Step 3: Cross multiply
    259,470.60x = 389,205.90 × 141,372.60
  4. Step 4: Simplify right side
    259,470.60x = 55,023,050,018.34
  5. Step 5: Solve for x
    x = 55,023,050,018.34/259,470.60
  6. Step 6: Final answer
    x = 212,058.90

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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.