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Finding the Fourth Proportional to 631,678.66, 871,718.82 and 345,198.76

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Solution

The fourth proportional to 631,678.66, 871,718.82 and 345,198.76 is: 476,375.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,678.66 : 871,718.82 = 345,198.76 : x
  2. Step 2: Convert to fraction form
    631,678.66/871,718.82 = 345,198.76/x
  3. Step 3: Cross multiply
    631,678.66x = 871,718.82 × 345,198.76
  4. Step 4: Simplify right side
    631,678.66x = 300,916,255,732.66
  5. Step 5: Solve for x
    x = 300,916,255,732.66/631,678.66
  6. Step 6: Final answer
    x = 476,375.53

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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.