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Finding the Fourth Proportional to 640,674.09, 961,020.45 and 167,359.50

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Solution

The fourth proportional to 640,674.09, 961,020.45 and 167,359.50 is: 251,041.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,674.09 : 961,020.45 = 167,359.50 : x
  2. Step 2: Convert to fraction form
    640,674.09/961,020.45 = 167,359.50/x
  3. Step 3: Cross multiply
    640,674.09x = 961,020.45 × 167,359.50
  4. Step 4: Simplify right side
    640,674.09x = 160,835,902,001.78
  5. Step 5: Solve for x
    x = 160,835,902,001.78/640,674.09
  6. Step 6: Final answer
    x = 251,041.68

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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.