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Finding the Fourth Proportional to 426,015.70, 638,780.55 and 159,784.90

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Solution

The fourth proportional to 426,015.70, 638,780.55 and 159,784.90 is: 239,586.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.70 : 638,780.55 = 159,784.90 : x
  2. Step 2: Convert to fraction form
    426,015.70/638,780.55 = 159,784.90/x
  3. Step 3: Cross multiply
    426,015.70x = 638,780.55 × 159,784.90
  4. Step 4: Simplify right side
    426,015.70x = 102,067,486,303.70
  5. Step 5: Solve for x
    x = 102,067,486,303.70/426,015.70
  6. Step 6: Final answer
    x = 239,586.21

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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.