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Finding the Fourth Proportional to 631,469.46, 871,459.46 and 386,377.54

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Solution

The fourth proportional to 631,469.46, 871,459.46 and 386,377.54 is: 533,220.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,469.46 : 871,459.46 = 386,377.54 : x
  2. Step 2: Convert to fraction form
    631,469.46/871,459.46 = 386,377.54/x
  3. Step 3: Cross multiply
    631,469.46x = 871,459.46 × 386,377.54
  4. Step 4: Simplify right side
    631,469.46x = 336,712,361,151.82
  5. Step 5: Solve for x
    x = 336,712,361,151.82/631,469.46
  6. Step 6: Final answer
    x = 533,220.34

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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.