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Finding the Fourth Proportional to 819,252.80, 1,228,879.20 and 679,284.80

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Solution

The fourth proportional to 819,252.80, 1,228,879.20 and 679,284.80 is: 1,018,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,252.80 : 1,228,879.20 = 679,284.80 : x
  2. Step 2: Convert to fraction form
    819,252.80/1,228,879.20 = 679,284.80/x
  3. Step 3: Cross multiply
    819,252.80x = 1,228,879.20 × 679,284.80
  4. Step 4: Simplify right side
    819,252.80x = 834,758,961,596.16
  5. Step 5: Solve for x
    x = 834,758,961,596.16/819,252.80
  6. Step 6: Final answer
    x = 1,018,927.20

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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.