Home / 521,309.20-782,036.70-221,787.40

Finding the Fourth Proportional to 521,309.20, 782,036.70 and 221,787.40

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Solution

The fourth proportional to 521,309.20, 782,036.70 and 221,787.40 is: 332,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,309.20 : 782,036.70 = 221,787.40 : x
  2. Step 2: Convert to fraction form
    521,309.20/782,036.70 = 221,787.40/x
  3. Step 3: Cross multiply
    521,309.20x = 782,036.70 × 221,787.40
  4. Step 4: Simplify right side
    521,309.20x = 173,445,886,397.58
  5. Step 5: Solve for x
    x = 173,445,886,397.58/521,309.20
  6. Step 6: Final answer
    x = 332,712.11

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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.