Home / 418,961.23-628,433.34-103,420.87

Finding the Fourth Proportional to 418,961.23, 628,433.34 and 103,420.87

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Solution

The fourth proportional to 418,961.23, 628,433.34 and 103,420.87 is: 155,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,961.23 : 628,433.34 = 103,420.87 : x
  2. Step 2: Convert to fraction form
    418,961.23/628,433.34 = 103,420.87/x
  3. Step 3: Cross multiply
    418,961.23x = 628,433.34 × 103,420.87
  4. Step 4: Simplify right side
    418,961.23x = 64,993,122,759.81
  5. Step 5: Solve for x
    x = 64,993,122,759.81/418,961.23
  6. Step 6: Final answer
    x = 155,129.21

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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.