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Finding the Fourth Proportional to 518,809.80, 777,782.70 and 219,520.20

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Solution

The fourth proportional to 518,809.80, 777,782.70 and 219,520.20 is: 329,097.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,809.80 : 777,782.70 = 219,520.20 : x
  2. Step 2: Convert to fraction form
    518,809.80/777,782.70 = 219,520.20/x
  3. Step 3: Cross multiply
    518,809.80x = 777,782.70 × 219,520.20
  4. Step 4: Simplify right side
    518,809.80x = 170,739,013,860.54
  5. Step 5: Solve for x
    x = 170,739,013,860.54/518,809.80
  6. Step 6: Final answer
    x = 329,097.51

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1.5x scale

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.