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Finding the Fourth Proportional to 426,865.06, 640,392.63 and 127,350.82

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Solution

The fourth proportional to 426,865.06, 640,392.63 and 127,350.82 is: 191,054.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,865.06 : 640,392.63 = 127,350.82 : x
  2. Step 2: Convert to fraction form
    426,865.06/640,392.63 = 127,350.82/x
  3. Step 3: Cross multiply
    426,865.06x = 640,392.63 × 127,350.82
  4. Step 4: Simplify right side
    426,865.06x = 81,554,526,552.46
  5. Step 5: Solve for x
    x = 81,554,526,552.46/426,865.06
  6. Step 6: Final answer
    x = 191,054.58

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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.