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Finding the Fourth Proportional to 1,213,279.80, 1,819,919.70 and 835,366.20

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Solution

The fourth proportional to 1,213,279.80, 1,819,919.70 and 835,366.20 is: 1,253,049.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,279.80 : 1,819,919.70 = 835,366.20 : x
  2. Step 2: Convert to fraction form
    1,213,279.80/1,819,919.70 = 835,366.20/x
  3. Step 3: Cross multiply
    1,213,279.80x = 1,819,919.70 × 835,366.20
  4. Step 4: Simplify right side
    1,213,279.80x = 1,520,299,404,094.14
  5. Step 5: Solve for x
    x = 1,520,299,404,094.14/1,213,279.80
  6. Step 6: Final answer
    x = 1,253,049.30

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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.