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Finding the Fourth Proportional to 260,737.61, 391,218.80 and 140,770.74

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Solution

The fourth proportional to 260,737.61, 391,218.80 and 140,770.74 is: 211,216.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,737.61 : 391,218.80 = 140,770.74 : x
  2. Step 2: Convert to fraction form
    260,737.61/391,218.80 = 140,770.74/x
  3. Step 3: Cross multiply
    260,737.61x = 391,218.80 × 140,770.74
  4. Step 4: Simplify right side
    260,737.61x = 55,072,159,977.91
  5. Step 5: Solve for x
    x = 55,072,159,977.91/260,737.61
  6. Step 6: Final answer
    x = 211,216.79

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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.