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Finding the Fourth Proportional to 631,712.18, 871,760.86 and 345,232.26

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Solution

The fourth proportional to 631,712.18, 871,760.86 and 345,232.26 is: 476,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,712.18 : 871,760.86 = 345,232.26 : x
  2. Step 2: Convert to fraction form
    631,712.18/871,760.86 = 345,232.26/x
  3. Step 3: Cross multiply
    631,712.18x = 871,760.86 × 345,232.26
  4. Step 4: Simplify right side
    631,712.18x = 300,959,971,014.26
  5. Step 5: Solve for x
    x = 300,959,971,014.26/631,712.18
  6. Step 6: Final answer
    x = 476,419.46

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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.