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Finding the Fourth Proportional to 426,959.98, 640,661.51 and 190,247.61

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Solution

The fourth proportional to 426,959.98, 640,661.51 and 190,247.61 is: 285,470.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,959.98 : 640,661.51 = 190,247.61 : x
  2. Step 2: Convert to fraction form
    426,959.98/640,661.51 = 190,247.61/x
  3. Step 3: Cross multiply
    426,959.98x = 640,661.51 × 190,247.61
  4. Step 4: Simplify right side
    426,959.98x = 121,884,321,096.49
  5. Step 5: Solve for x
    x = 121,884,321,096.49/426,959.98
  6. Step 6: Final answer
    x = 285,470.13

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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.