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Finding the Fourth Proportional to 640,903.40, 961,282.20 and 167,636.60

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Solution

The fourth proportional to 640,903.40, 961,282.20 and 167,636.60 is: 251,435.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,903.40 : 961,282.20 = 167,636.60 : x
  2. Step 2: Convert to fraction form
    640,903.40/961,282.20 = 167,636.60/x
  3. Step 3: Cross multiply
    640,903.40x = 961,282.20 × 167,636.60
  4. Step 4: Simplify right side
    640,903.40x = 161,146,079,648.52
  5. Step 5: Solve for x
    x = 161,146,079,648.52/640,903.40
  6. Step 6: Final answer
    x = 251,435.83

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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.