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Finding the Fourth Proportional to 631,521.43, 871,489.28 and 345,035.35

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Solution

The fourth proportional to 631,521.43, 871,489.28 and 345,035.35 is: 476,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,521.43 : 871,489.28 = 345,035.35 : x
  2. Step 2: Convert to fraction form
    631,521.43/871,489.28 = 345,035.35/x
  3. Step 3: Cross multiply
    631,521.43x = 871,489.28 × 345,035.35
  4. Step 4: Simplify right side
    631,521.43x = 300,694,607,020.87
  5. Step 5: Solve for x
    x = 300,694,607,020.87/631,521.43
  6. Step 6: Final answer
    x = 476,143.16

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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.