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Finding the Fourth Proportional to 1,206,869.70, 1,805,638.95 and 786,965.70

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Solution

The fourth proportional to 1,206,869.70, 1,805,638.95 and 786,965.70 is: 1,177,406.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,869.70 : 1,805,638.95 = 786,965.70 : x
  2. Step 2: Convert to fraction form
    1,206,869.70/1,805,638.95 = 786,965.70/x
  3. Step 3: Cross multiply
    1,206,869.70x = 1,805,638.95 × 786,965.70
  4. Step 4: Simplify right side
    1,206,869.70x = 1,420,975,920,234.02
  5. Step 5: Solve for x
    x = 1,420,975,920,234.02/1,206,869.70
  6. Step 6: Final answer
    x = 1,177,406.24

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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.