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Finding the Fourth Proportional to 479,712.72, 661,975.02 and 261,877.94

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Solution

The fourth proportional to 479,712.72, 661,975.02 and 261,877.94 is: 361,375.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,712.72 : 661,975.02 = 261,877.94 : x
  2. Step 2: Convert to fraction form
    479,712.72/661,975.02 = 261,877.94/x
  3. Step 3: Cross multiply
    479,712.72x = 661,975.02 × 261,877.94
  4. Step 4: Simplify right side
    479,712.72x = 173,356,651,259.18
  5. Step 5: Solve for x
    x = 173,356,651,259.18/479,712.72
  6. Step 6: Final answer
    x = 361,375.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.