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Finding the Fourth Proportional to 1,290,956.97, 1,934,663.91 and 816,793.50

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Solution

The fourth proportional to 1,290,956.97, 1,934,663.91 and 816,793.50 is: 1,224,069.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,956.97 : 1,934,663.91 = 816,793.50 : x
  2. Step 2: Convert to fraction form
    1,290,956.97/1,934,663.91 = 816,793.50/x
  3. Step 3: Cross multiply
    1,290,956.97x = 1,934,663.91 × 816,793.50
  4. Step 4: Simplify right side
    1,290,956.97x = 1,580,220,906,372.59
  5. Step 5: Solve for x
    x = 1,580,220,906,372.59/1,290,956.97
  6. Step 6: Final answer
    x = 1,224,069.39

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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.