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Finding the Fourth Proportional to 665,754.30, 998,609.58 and 266,287.86

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Solution

The fourth proportional to 665,754.30, 998,609.58 and 266,287.86 is: 399,423.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,754.30 : 998,609.58 = 266,287.86 : x
  2. Step 2: Convert to fraction form
    665,754.30/998,609.58 = 266,287.86/x
  3. Step 3: Cross multiply
    665,754.30x = 998,609.58 × 266,287.86
  4. Step 4: Simplify right side
    665,754.30x = 265,917,608,033.70
  5. Step 5: Solve for x
    x = 265,917,608,033.70/665,754.30
  6. Step 6: Final answer
    x = 399,423.04

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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.