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Finding the Fourth Proportional to 638,891.50, 958,056.58 and 239,251.98

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Solution

The fourth proportional to 638,891.50, 958,056.58 and 239,251.98 is: 358,772.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,891.50 : 958,056.58 = 239,251.98 : x
  2. Step 2: Convert to fraction form
    638,891.50/958,056.58 = 239,251.98/x
  3. Step 3: Cross multiply
    638,891.50x = 958,056.58 × 239,251.98
  4. Step 4: Simplify right side
    638,891.50x = 229,216,933,717.03
  5. Step 5: Solve for x
    x = 229,216,933,717.03/638,891.50
  6. Step 6: Final answer
    x = 358,772.86

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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.