Home / 819,939.40-1,229,909.10-788,446.60

Finding the Fourth Proportional to 819,939.40, 1,229,909.10 and 788,446.60

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Solution

The fourth proportional to 819,939.40, 1,229,909.10 and 788,446.60 is: 1,182,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,939.40 : 1,229,909.10 = 788,446.60 : x
  2. Step 2: Convert to fraction form
    819,939.40/1,229,909.10 = 788,446.60/x
  3. Step 3: Cross multiply
    819,939.40x = 1,229,909.10 × 788,446.60
  4. Step 4: Simplify right side
    819,939.40x = 969,717,648,204.06
  5. Step 5: Solve for x
    x = 969,717,648,204.06/819,939.40
  6. Step 6: Final answer
    x = 1,182,669.90

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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.