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Finding the Fourth Proportional to 518,690.18, 777,848.06 and 219,193.90

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Solution

The fourth proportional to 518,690.18, 777,848.06 and 219,193.90 is: 328,711.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,690.18 : 777,848.06 = 219,193.90 : x
  2. Step 2: Convert to fraction form
    518,690.18/777,848.06 = 219,193.90/x
  3. Step 3: Cross multiply
    518,690.18x = 777,848.06 × 219,193.90
  4. Step 4: Simplify right side
    518,690.18x = 170,499,548,482.20
  5. Step 5: Solve for x
    x = 170,499,548,482.20/518,690.18
  6. Step 6: Final answer
    x = 328,711.73

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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.