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Finding the Fourth Proportional to 403,361.28, 605,174.40 and 203,587.20

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Solution

The fourth proportional to 403,361.28, 605,174.40 and 203,587.20 is: 305,447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,361.28 : 605,174.40 = 203,587.20 : x
  2. Step 2: Convert to fraction form
    403,361.28/605,174.40 = 203,587.20/x
  3. Step 3: Cross multiply
    403,361.28x = 605,174.40 × 203,587.20
  4. Step 4: Simplify right side
    403,361.28x = 123,205,761,607.68
  5. Step 5: Solve for x
    x = 123,205,761,607.68/403,361.28
  6. Step 6: Final answer
    x = 305,447.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.