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Finding the Fourth Proportional to 420,079.76, 579,382.44 and 269,190.80

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Solution

The fourth proportional to 420,079.76, 579,382.44 and 269,190.80 is: 371,273.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,079.76 : 579,382.44 = 269,190.80 : x
  2. Step 2: Convert to fraction form
    420,079.76/579,382.44 = 269,190.80/x
  3. Step 3: Cross multiply
    420,079.76x = 579,382.44 × 269,190.80
  4. Step 4: Simplify right side
    420,079.76x = 155,964,422,529.55
  5. Step 5: Solve for x
    x = 155,964,422,529.55/420,079.76
  6. Step 6: Final answer
    x = 371,273.36

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1.5x scale

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.