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Finding the Fourth Proportional to 722,415.76, 996,889.92 and 400,106.56

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Solution

The fourth proportional to 722,415.76, 996,889.92 and 400,106.56 is: 552,122.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,415.76 : 996,889.92 = 400,106.56 : x
  2. Step 2: Convert to fraction form
    722,415.76/996,889.92 = 400,106.56/x
  3. Step 3: Cross multiply
    722,415.76x = 996,889.92 × 400,106.56
  4. Step 4: Simplify right side
    722,415.76x = 398,862,196,589.88
  5. Step 5: Solve for x
    x = 398,862,196,589.88/722,415.76
  6. Step 6: Final answer
    x = 552,122.78

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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.