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Finding the Fourth Proportional to 1,272,435, 1,755,922.86 and 728,552.76

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Solution

The fourth proportional to 1,272,435, 1,755,922.86 and 728,552.76 is: 1,005,381.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,435 : 1,755,922.86 = 728,552.76 : x
  2. Step 2: Convert to fraction form
    1,272,435/1,755,922.86 = 728,552.76/x
  3. Step 3: Cross multiply
    1,272,435x = 1,755,922.86 × 728,552.76
  4. Step 4: Simplify right side
    1,272,435x = 1,279,282,446,000.09
  5. Step 5: Solve for x
    x = 1,279,282,446,000.09/1,272,435
  6. Step 6: Final answer
    x = 1,005,381.37

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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.