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Finding the Fourth Proportional to 640,743.40, 961,042.20 and 167,476.60

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Solution

The fourth proportional to 640,743.40, 961,042.20 and 167,476.60 is: 251,195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,743.40 : 961,042.20 = 167,476.60 : x
  2. Step 2: Convert to fraction form
    640,743.40/961,042.20 = 167,476.60/x
  3. Step 3: Cross multiply
    640,743.40x = 961,042.20 × 167,476.60
  4. Step 4: Simplify right side
    640,743.40x = 160,952,080,112.52
  5. Step 5: Solve for x
    x = 160,952,080,112.52/640,743.40
  6. Step 6: Final answer
    x = 251,195.85

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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.