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Finding the Fourth Proportional to 640,864.20, 961,212.87 and 167,586.06

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Solution

The fourth proportional to 640,864.20, 961,212.87 and 167,586.06 is: 251,357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,864.20 : 961,212.87 = 167,586.06 : x
  2. Step 2: Convert to fraction form
    640,864.20/961,212.87 = 167,586.06/x
  3. Step 3: Cross multiply
    640,864.20x = 961,212.87 × 167,586.06
  4. Step 4: Simplify right side
    640,864.20x = 161,085,877,704.59
  5. Step 5: Solve for x
    x = 161,085,877,704.59/640,864.20
  6. Step 6: Final answer
    x = 251,357.27

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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.