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Finding the Fourth Proportional to 631,697.28, 871,481.76 and 440,821.44

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Solution

The fourth proportional to 631,697.28, 871,481.76 and 440,821.44 is: 608,151.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,697.28 : 871,481.76 = 440,821.44 : x
  2. Step 2: Convert to fraction form
    631,697.28/871,481.76 = 440,821.44/x
  3. Step 3: Cross multiply
    631,697.28x = 871,481.76 × 440,821.44
  4. Step 4: Simplify right side
    631,697.28x = 384,167,844,376.93
  5. Step 5: Solve for x
    x = 384,167,844,376.93/631,697.28
  6. Step 6: Final answer
    x = 608,151.81

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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.