Home / 819,705.20-1,228,245.60-538,894.40

Finding the Fourth Proportional to 819,705.20, 1,228,245.60 and 538,894.40

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Solution

The fourth proportional to 819,705.20, 1,228,245.60 and 538,894.40 is: 807,478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,705.20 : 1,228,245.60 = 538,894.40 : x
  2. Step 2: Convert to fraction form
    819,705.20/1,228,245.60 = 538,894.40/x
  3. Step 3: Cross multiply
    819,705.20x = 1,228,245.60 × 538,894.40
  4. Step 4: Simplify right side
    819,705.20x = 661,894,675,664.64
  5. Step 5: Solve for x
    x = 661,894,675,664.64/819,705.20
  6. Step 6: Final answer
    x = 807,478.93

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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.