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Finding the Fourth Proportional to 479,371.30, 661,510.26 and 275,278.64

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Solution

The fourth proportional to 479,371.30, 661,510.26 and 275,278.64 is: 379,871.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,371.30 : 661,510.26 = 275,278.64 : x
  2. Step 2: Convert to fraction form
    479,371.30/661,510.26 = 275,278.64/x
  3. Step 3: Cross multiply
    479,371.30x = 661,510.26 × 275,278.64
  4. Step 4: Simplify right side
    479,371.30x = 182,099,641,411.30
  5. Step 5: Solve for x
    x = 182,099,641,411.30/479,371.30
  6. Step 6: Final answer
    x = 379,871.81

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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.