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Finding the Fourth Proportional to 631,528.86, 871,499.64 and 345,042.79

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Solution

The fourth proportional to 631,528.86, 871,499.64 and 345,042.79 is: 476,153.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,528.86 : 871,499.64 = 345,042.79 : x
  2. Step 2: Convert to fraction form
    631,528.86/871,499.64 = 345,042.79/x
  3. Step 3: Cross multiply
    631,528.86x = 871,499.64 × 345,042.79
  4. Step 4: Simplify right side
    631,528.86x = 300,704,667,269.60
  5. Step 5: Solve for x
    x = 300,704,667,269.60/631,528.86
  6. Step 6: Final answer
    x = 476,153.48

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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.