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Finding the Fourth Proportional to 665,963.44, 998,779.07 and 261,237.89

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Solution

The fourth proportional to 665,963.44, 998,779.07 and 261,237.89 is: 391,791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,963.44 : 998,779.07 = 261,237.89 : x
  2. Step 2: Convert to fraction form
    665,963.44/998,779.07 = 261,237.89/x
  3. Step 3: Cross multiply
    665,963.44x = 998,779.07 × 261,237.89
  4. Step 4: Simplify right side
    665,963.44x = 260,918,935,516.77
  5. Step 5: Solve for x
    x = 260,918,935,516.77/665,963.44
  6. Step 6: Final answer
    x = 391,791.68

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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.