Home / 420,985.90-631,037.76-196,160.86

Finding the Fourth Proportional to 420,985.90, 631,037.76 and 196,160.86

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Solution

The fourth proportional to 420,985.90, 631,037.76 and 196,160.86 is: 294,035.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,985.90 : 631,037.76 = 196,160.86 : x
  2. Step 2: Convert to fraction form
    420,985.90/631,037.76 = 196,160.86/x
  3. Step 3: Cross multiply
    420,985.90x = 631,037.76 × 196,160.86
  4. Step 4: Simplify right side
    420,985.90x = 123,784,909,694.07
  5. Step 5: Solve for x
    x = 123,784,909,694.07/420,985.90
  6. Step 6: Final answer
    x = 294,035.76

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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.