Home / 420,767.90-631,157.42-140,285.24

Finding the Fourth Proportional to 420,767.90, 631,157.42 and 140,285.24

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Solution

The fourth proportional to 420,767.90, 631,157.42 and 140,285.24 is: 210,429.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,767.90 : 631,157.42 = 140,285.24 : x
  2. Step 2: Convert to fraction form
    420,767.90/631,157.42 = 140,285.24/x
  3. Step 3: Cross multiply
    420,767.90x = 631,157.42 × 140,285.24
  4. Step 4: Simplify right side
    420,767.90x = 88,542,066,986.69
  5. Step 5: Solve for x
    x = 88,542,066,986.69/420,767.90
  6. Step 6: Final answer
    x = 210,429.71

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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.