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Finding the Fourth Proportional to 631,872.56, 871,984.17 and 345,393.79

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Solution

The fourth proportional to 631,872.56, 871,984.17 and 345,393.79 is: 476,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,872.56 : 871,984.17 = 345,393.79 : x
  2. Step 2: Convert to fraction form
    631,872.56/871,984.17 = 345,393.79/x
  3. Step 3: Cross multiply
    631,872.56x = 871,984.17 × 345,393.79
  4. Step 4: Simplify right side
    631,872.56x = 301,177,915,116.34
  5. Step 5: Solve for x
    x = 301,177,915,116.34/631,872.56
  6. Step 6: Final answer
    x = 476,643.45

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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.