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Finding the Fourth Proportional to 640,561.37, 960,881.67 and 214,135.58

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Solution

The fourth proportional to 640,561.37, 960,881.67 and 214,135.58 is: 321,216.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,561.37 : 960,881.67 = 214,135.58 : x
  2. Step 2: Convert to fraction form
    640,561.37/960,881.67 = 214,135.58/x
  3. Step 3: Cross multiply
    640,561.37x = 960,881.67 × 214,135.58
  4. Step 4: Simplify right side
    640,561.37x = 205,758,953,716.82
  5. Step 5: Solve for x
    x = 205,758,953,716.82/640,561.37
  6. Step 6: Final answer
    x = 321,216.61

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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.