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Finding the Fourth Proportional to 666,469.80, 998,829.90 and 266,783.40

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Solution

The fourth proportional to 666,469.80, 998,829.90 and 266,783.40 is: 399,824.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,469.80 : 998,829.90 = 266,783.40 : x
  2. Step 2: Convert to fraction form
    666,469.80/998,829.90 = 266,783.40/x
  3. Step 3: Cross multiply
    666,469.80x = 998,829.90 × 266,783.40
  4. Step 4: Simplify right side
    666,469.80x = 266,471,236,743.66
  5. Step 5: Solve for x
    x = 266,471,236,743.66/666,469.80
  6. Step 6: Final answer
    x = 399,824.92

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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.