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Finding the Fourth Proportional to 631,513.67, 871,548.05 and 345,076.20

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Solution

The fourth proportional to 631,513.67, 871,548.05 and 345,076.20 is: 476,237.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,513.67 : 871,548.05 = 345,076.20 : x
  2. Step 2: Convert to fraction form
    631,513.67/871,548.05 = 345,076.20/x
  3. Step 3: Cross multiply
    631,513.67x = 871,548.05 × 345,076.20
  4. Step 4: Simplify right side
    631,513.67x = 300,750,490,074.10
  5. Step 5: Solve for x
    x = 300,750,490,074.10/631,513.67
  6. Step 6: Final answer
    x = 476,237.50

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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.