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Finding the Fourth Proportional to 819,657.20, 1,229,485.80 and 814,408.40

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Solution

The fourth proportional to 819,657.20, 1,229,485.80 and 814,408.40 is: 1,221,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,657.20 : 1,229,485.80 = 814,408.40 : x
  2. Step 2: Convert to fraction form
    819,657.20/1,229,485.80 = 814,408.40/x
  3. Step 3: Cross multiply
    819,657.20x = 1,229,485.80 × 814,408.40
  4. Step 4: Simplify right side
    819,657.20x = 1,001,303,563,200.72
  5. Step 5: Solve for x
    x = 1,001,303,563,200.72/819,657.20
  6. Step 6: Final answer
    x = 1,221,612.60

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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.