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Finding the Fourth Proportional to 631,356.90, 871,293.45 and 344,903.70

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Solution

The fourth proportional to 631,356.90, 871,293.45 and 344,903.70 is: 475,978.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,356.90 : 871,293.45 = 344,903.70 : x
  2. Step 2: Convert to fraction form
    631,356.90/871,293.45 = 344,903.70/x
  3. Step 3: Cross multiply
    631,356.90x = 871,293.45 × 344,903.70
  4. Step 4: Simplify right side
    631,356.90x = 300,512,334,690.77
  5. Step 5: Solve for x
    x = 300,512,334,690.77/631,356.90
  6. Step 6: Final answer
    x = 475,978.54

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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.