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Finding the Fourth Proportional to 641,143.48, 961,802.70 and 267,079

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Solution

The fourth proportional to 641,143.48, 961,802.70 and 267,079 is: 400,654.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,143.48 : 961,802.70 = 267,079 : x
  2. Step 2: Convert to fraction form
    641,143.48/961,802.70 = 267,079/x
  3. Step 3: Cross multiply
    641,143.48x = 961,802.70 × 267,079
  4. Step 4: Simplify right side
    641,143.48x = 256,877,303,313.30
  5. Step 5: Solve for x
    x = 256,877,303,313.30/641,143.48
  6. Step 6: Final answer
    x = 400,654.94

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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.