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Finding the Fourth Proportional to 426,863.52, 640,467.54 and 190,044.36

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Solution

The fourth proportional to 426,863.52, 640,467.54 and 190,044.36 is: 285,143.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,863.52 : 640,467.54 = 190,044.36 : x
  2. Step 2: Convert to fraction form
    426,863.52/640,467.54 = 190,044.36/x
  3. Step 3: Cross multiply
    426,863.52x = 640,467.54 × 190,044.36
  4. Step 4: Simplify right side
    426,863.52x = 121,717,243,740.07
  5. Step 5: Solve for x
    x = 121,717,243,740.07/426,863.52
  6. Step 6: Final answer
    x = 285,143.23

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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.