Home / 420,845.54-631,270.72-140,361.98

Finding the Fourth Proportional to 420,845.54, 631,270.72 and 140,361.98

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Solution

The fourth proportional to 420,845.54, 631,270.72 and 140,361.98 is: 210,543.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,845.54 : 631,270.72 = 140,361.98 : x
  2. Step 2: Convert to fraction form
    420,845.54/631,270.72 = 140,361.98/x
  3. Step 3: Cross multiply
    420,845.54x = 631,270.72 × 140,361.98
  4. Step 4: Simplify right side
    420,845.54x = 88,606,408,175.23
  5. Step 5: Solve for x
    x = 88,606,408,175.23/420,845.54
  6. Step 6: Final answer
    x = 210,543.77

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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.