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Finding the Fourth Proportional to 631,628.53, 871,736.28 and 402,112.45

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Solution

The fourth proportional to 631,628.53, 871,736.28 and 402,112.45 is: 554,971.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,628.53 : 871,736.28 = 402,112.45 : x
  2. Step 2: Convert to fraction form
    631,628.53/871,736.28 = 402,112.45/x
  3. Step 3: Cross multiply
    631,628.53x = 871,736.28 × 402,112.45
  4. Step 4: Simplify right side
    631,628.53x = 350,536,011,304.69
  5. Step 5: Solve for x
    x = 350,536,011,304.69/631,628.53
  6. Step 6: Final answer
    x = 554,971.78

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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.