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Finding the Fourth Proportional to 631,393.92, 871,312.68 and 344,906.64

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Solution

The fourth proportional to 631,393.92, 871,312.68 and 344,906.64 is: 475,965.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,393.92 : 871,312.68 = 344,906.64 : x
  2. Step 2: Convert to fraction form
    631,393.92/871,312.68 = 344,906.64/x
  3. Step 3: Cross multiply
    631,393.92x = 871,312.68 × 344,906.64
  4. Step 4: Simplify right side
    631,393.92x = 300,521,528,848.20
  5. Step 5: Solve for x
    x = 300,521,528,848.20/631,393.92
  6. Step 6: Final answer
    x = 475,965.19

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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.