Home / 420,638.20-631,057.74-140,157.88

Finding the Fourth Proportional to 420,638.20, 631,057.74 and 140,157.88

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Solution

The fourth proportional to 420,638.20, 631,057.74 and 140,157.88 is: 210,270.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,638.20 : 631,057.74 = 140,157.88 : x
  2. Step 2: Convert to fraction form
    420,638.20/631,057.74 = 140,157.88/x
  3. Step 3: Cross multiply
    420,638.20x = 631,057.74 × 140,157.88
  4. Step 4: Simplify right side
    420,638.20x = 88,447,714,995.99
  5. Step 5: Solve for x
    x = 88,447,714,995.99/420,638.20
  6. Step 6: Final answer
    x = 210,270.29

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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.