Home / 1,288,638.72-1,782,174.76-1,127,213.21

Finding the Fourth Proportional to 1,288,638.72, 1,782,174.76 and 1,127,213.21

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Solution

The fourth proportional to 1,288,638.72, 1,782,174.76 and 1,127,213.21 is: 1,558,924.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,638.72 : 1,782,174.76 = 1,127,213.21 : x
  2. Step 2: Convert to fraction form
    1,288,638.72/1,782,174.76 = 1,127,213.21/x
  3. Step 3: Cross multiply
    1,288,638.72x = 1,782,174.76 × 1,127,213.21
  4. Step 4: Simplify right side
    1,288,638.72x = 2,008,890,933,637.98
  5. Step 5: Solve for x
    x = 2,008,890,933,637.98/1,288,638.72
  6. Step 6: Final answer
    x = 1,558,924.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.