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Finding the Fourth Proportional to 631,612.88, 871,628.04 and 345,132.96

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Solution

The fourth proportional to 631,612.88, 871,628.04 and 345,132.96 is: 476,284.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,612.88 : 871,628.04 = 345,132.96 : x
  2. Step 2: Convert to fraction form
    631,612.88/871,628.04 = 345,132.96/x
  3. Step 3: Cross multiply
    631,612.88x = 871,628.04 × 345,132.96
  4. Step 4: Simplify right side
    631,612.88x = 300,827,565,464.20
  5. Step 5: Solve for x
    x = 300,827,565,464.20/631,612.88
  6. Step 6: Final answer
    x = 476,284.72

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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.