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Finding the Fourth Proportional to 819,762.80, 1,229,644.20 and 579,225.20

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Solution

The fourth proportional to 819,762.80, 1,229,644.20 and 579,225.20 is: 868,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,762.80 : 1,229,644.20 = 579,225.20 : x
  2. Step 2: Convert to fraction form
    819,762.80/1,229,644.20 = 579,225.20/x
  3. Step 3: Cross multiply
    819,762.80x = 1,229,644.20 × 579,225.20
  4. Step 4: Simplify right side
    819,762.80x = 712,240,907,673.84
  5. Step 5: Solve for x
    x = 712,240,907,673.84/819,762.80
  6. Step 6: Final answer
    x = 868,837.80

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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.