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Finding the Fourth Proportional to 640,889.21, 961,388.70 and 167,573.81

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Solution

The fourth proportional to 640,889.21, 961,388.70 and 167,573.81 is: 251,375.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,889.21 : 961,388.70 = 167,573.81 : x
  2. Step 2: Convert to fraction form
    640,889.21/961,388.70 = 167,573.81/x
  3. Step 3: Cross multiply
    640,889.21x = 961,388.70 × 167,573.81
  4. Step 4: Simplify right side
    640,889.21x = 161,103,569,125.02
  5. Step 5: Solve for x
    x = 161,103,569,125.02/640,889.21
  6. Step 6: Final answer
    x = 251,375.07

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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.