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Finding the Fourth Proportional to 439,886.40, 659,764.80 and 124,375.20

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Solution

The fourth proportional to 439,886.40, 659,764.80 and 124,375.20 is: 186,544.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,886.40 : 659,764.80 = 124,375.20 : x
  2. Step 2: Convert to fraction form
    439,886.40/659,764.80 = 124,375.20/x
  3. Step 3: Cross multiply
    439,886.40x = 659,764.80 × 124,375.20
  4. Step 4: Simplify right side
    439,886.40x = 82,058,378,952.96
  5. Step 5: Solve for x
    x = 82,058,378,952.96/439,886.40
  6. Step 6: Final answer
    x = 186,544.48

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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.