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Finding the Fourth Proportional to 631,501.74, 871,484.94 and 345,039.60

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Solution

The fourth proportional to 631,501.74, 871,484.94 and 345,039.60 is: 476,161.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,501.74 : 871,484.94 = 345,039.60 : x
  2. Step 2: Convert to fraction form
    631,501.74/871,484.94 = 345,039.60/x
  3. Step 3: Cross multiply
    631,501.74x = 871,484.94 × 345,039.60
  4. Step 4: Simplify right side
    631,501.74x = 300,696,815,103.62
  5. Step 5: Solve for x
    x = 300,696,815,103.62/631,501.74
  6. Step 6: Final answer
    x = 476,161.50

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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.