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Finding the Fourth Proportional to 285,625.50, 428,726.40 and 125,772.54

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Solution

The fourth proportional to 285,625.50, 428,726.40 and 125,772.54 is: 188,785.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,625.50 : 428,726.40 = 125,772.54 : x
  2. Step 2: Convert to fraction form
    285,625.50/428,726.40 = 125,772.54/x
  3. Step 3: Cross multiply
    285,625.50x = 428,726.40 × 125,772.54
  4. Step 4: Simplify right side
    285,625.50x = 53,922,008,293.06
  5. Step 5: Solve for x
    x = 53,922,008,293.06/285,625.50
  6. Step 6: Final answer
    x = 188,785.69

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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.