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Finding the Fourth Proportional to 812,964.60, 1,220,829.30 and 602,839.80

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Solution

The fourth proportional to 812,964.60, 1,220,829.30 and 602,839.80 is: 905,284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,964.60 : 1,220,829.30 = 602,839.80 : x
  2. Step 2: Convert to fraction form
    812,964.60/1,220,829.30 = 602,839.80/x
  3. Step 3: Cross multiply
    812,964.60x = 1,220,829.30 × 602,839.80
  4. Step 4: Simplify right side
    812,964.60x = 735,964,491,046.14
  5. Step 5: Solve for x
    x = 735,964,491,046.14/812,964.60
  6. Step 6: Final answer
    x = 905,284.79

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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.