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Finding the Fourth Proportional to 640,934.73, 961,328.66 and 167,665.77

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Solution

The fourth proportional to 640,934.73, 961,328.66 and 167,665.77 is: 251,479.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,934.73 : 961,328.66 = 167,665.77 : x
  2. Step 2: Convert to fraction form
    640,934.73/961,328.66 = 167,665.77/x
  3. Step 3: Cross multiply
    640,934.73x = 961,328.66 × 167,665.77
  4. Step 4: Simplify right side
    640,934.73x = 161,181,909,163.64
  5. Step 5: Solve for x
    x = 161,181,909,163.64/640,934.73
  6. Step 6: Final answer
    x = 251,479.44

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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.