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Finding the Fourth Proportional to 425,479.58, 638,226.06 and 125,990.58

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Solution

The fourth proportional to 425,479.58, 638,226.06 and 125,990.58 is: 188,987.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,479.58 : 638,226.06 = 125,990.58 : x
  2. Step 2: Convert to fraction form
    425,479.58/638,226.06 = 125,990.58/x
  3. Step 3: Cross multiply
    425,479.58x = 638,226.06 × 125,990.58
  4. Step 4: Simplify right side
    425,479.58x = 80,410,471,470.51
  5. Step 5: Solve for x
    x = 80,410,471,470.51/425,479.58
  6. Step 6: Final answer
    x = 188,987.85

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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.