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Finding the Fourth Proportional to 1,229,806.80, 1,845,487.80 and 724,366.80

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Solution

The fourth proportional to 1,229,806.80, 1,845,487.80 and 724,366.80 is: 1,087,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229,806.80 : 1,845,487.80 = 724,366.80 : x
  2. Step 2: Convert to fraction form
    1,229,806.80/1,845,487.80 = 724,366.80/x
  3. Step 3: Cross multiply
    1,229,806.80x = 1,845,487.80 × 724,366.80
  4. Step 4: Simplify right side
    1,229,806.80x = 1,336,810,092,125.04
  5. Step 5: Solve for x
    x = 1,336,810,092,125.04/1,229,806.80
  6. Step 6: Final answer
    x = 1,087,008.21

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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.