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Finding the Fourth Proportional to 518,779.80, 777,737.70 and 219,490.20

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Solution

The fourth proportional to 518,779.80, 777,737.70 and 219,490.20 is: 329,052.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,779.80 : 777,737.70 = 219,490.20 : x
  2. Step 2: Convert to fraction form
    518,779.80/777,737.70 = 219,490.20/x
  3. Step 3: Cross multiply
    518,779.80x = 777,737.70 × 219,490.20
  4. Step 4: Simplify right side
    518,779.80x = 170,705,803,320.54
  5. Step 5: Solve for x
    x = 170,705,803,320.54/518,779.80
  6. Step 6: Final answer
    x = 329,052.53

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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.