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Finding the Fourth Proportional to 665,633.61, 998,446.77 and 266,366.79

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Solution

The fourth proportional to 665,633.61, 998,446.77 and 266,366.79 is: 399,548.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,633.61 : 998,446.77 = 266,366.79 : x
  2. Step 2: Convert to fraction form
    665,633.61/998,446.77 = 266,366.79/x
  3. Step 3: Cross multiply
    665,633.61x = 998,446.77 × 266,366.79
  4. Step 4: Simplify right side
    665,633.61x = 265,953,061,110.77
  5. Step 5: Solve for x
    x = 265,953,061,110.77/665,633.61
  6. Step 6: Final answer
    x = 399,548.73

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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.