Home / 1,381,605.20-2,072,407.80-820,350.80

Finding the Fourth Proportional to 1,381,605.20, 2,072,407.80 and 820,350.80

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Solution

The fourth proportional to 1,381,605.20, 2,072,407.80 and 820,350.80 is: 1,230,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381,605.20 : 2,072,407.80 = 820,350.80 : x
  2. Step 2: Convert to fraction form
    1,381,605.20/2,072,407.80 = 820,350.80/x
  3. Step 3: Cross multiply
    1,381,605.20x = 2,072,407.80 × 820,350.80
  4. Step 4: Simplify right side
    1,381,605.20x = 1,700,101,396,656.24
  5. Step 5: Solve for x
    x = 1,700,101,396,656.24/1,381,605.20
  6. Step 6: Final answer
    x = 1,230,526.20

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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.