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Finding the Fourth Proportional to 439,790.48, 659,748.60 and 140,274.46

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Solution

The fourth proportional to 439,790.48, 659,748.60 and 140,274.46 is: 210,431.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,790.48 : 659,748.60 = 140,274.46 : x
  2. Step 2: Convert to fraction form
    439,790.48/659,748.60 = 140,274.46/x
  3. Step 3: Cross multiply
    439,790.48x = 659,748.60 × 140,274.46
  4. Step 4: Simplify right side
    439,790.48x = 92,545,876,951.38
  5. Step 5: Solve for x
    x = 92,545,876,951.38/439,790.48
  6. Step 6: Final answer
    x = 210,431.74

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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.