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Finding the Fourth Proportional to 631,519.68, 871,486.86 and 345,033.60

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Solution

The fourth proportional to 631,519.68, 871,486.86 and 345,033.60 is: 476,140.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,519.68 : 871,486.86 = 345,033.60 : x
  2. Step 2: Convert to fraction form
    631,519.68/871,486.86 = 345,033.60/x
  3. Step 3: Cross multiply
    631,519.68x = 871,486.86 × 345,033.60
  4. Step 4: Simplify right side
    631,519.68x = 300,692,248,658.50
  5. Step 5: Solve for x
    x = 300,692,248,658.50/631,519.68
  6. Step 6: Final answer
    x = 476,140.74

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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.