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Finding the Fourth Proportional to 631,818.72, 871,961.76 and 359,971.92

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Solution

The fourth proportional to 631,818.72, 871,961.76 and 359,971.92 is: 496,790.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,818.72 : 871,961.76 = 359,971.92 : x
  2. Step 2: Convert to fraction form
    631,818.72/871,961.76 = 359,971.92/x
  3. Step 3: Cross multiply
    631,818.72x = 871,961.76 × 359,971.92
  4. Step 4: Simplify right side
    631,818.72x = 313,881,748,913.78
  5. Step 5: Solve for x
    x = 313,881,748,913.78/631,818.72
  6. Step 6: Final answer
    x = 496,790.83

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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.