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Finding the Fourth Proportional to 260,855.83, 391,209.93 and 118,621.55

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Solution

The fourth proportional to 260,855.83, 391,209.93 and 118,621.55 is: 177,898.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,855.83 : 391,209.93 = 118,621.55 : x
  2. Step 2: Convert to fraction form
    260,855.83/391,209.93 = 118,621.55/x
  3. Step 3: Cross multiply
    260,855.83x = 391,209.93 × 118,621.55
  4. Step 4: Simplify right side
    260,855.83x = 46,405,926,715.84
  5. Step 5: Solve for x
    x = 46,405,926,715.84/260,855.83
  6. Step 6: Final answer
    x = 177,898.76

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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.