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Finding the Fourth Proportional to 805,912.80, 1,208,869.20 and 805,912.80

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Solution

The fourth proportional to 805,912.80, 1,208,869.20 and 805,912.80 is: 1,208,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,912.80 : 1,208,869.20 = 805,912.80 : x
  2. Step 2: Convert to fraction form
    805,912.80/1,208,869.20 = 805,912.80/x
  3. Step 3: Cross multiply
    805,912.80x = 1,208,869.20 × 805,912.80
  4. Step 4: Simplify right side
    805,912.80x = 974,243,161,805.76
  5. Step 5: Solve for x
    x = 974,243,161,805.76/805,912.80
  6. Step 6: Final answer
    x = 1,208,869.20

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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.