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Finding the Fourth Proportional to 266,556.60, 399,775.87 and 76,975.70

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Solution

The fourth proportional to 266,556.60, 399,775.87 and 76,975.70 is: 115,446.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,556.60 : 399,775.87 = 76,975.70 : x
  2. Step 2: Convert to fraction form
    266,556.60/399,775.87 = 76,975.70/x
  3. Step 3: Cross multiply
    266,556.60x = 399,775.87 × 76,975.70
  4. Step 4: Simplify right side
    266,556.60x = 30,773,025,533.70
  5. Step 5: Solve for x
    x = 30,773,025,533.70/266,556.60
  6. Step 6: Final answer
    x = 115,446.50

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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.