Home / 426,474.20-639,419.70-201,942.20

Finding the Fourth Proportional to 426,474.20, 639,419.70 and 201,942.20

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Solution

The fourth proportional to 426,474.20, 639,419.70 and 201,942.20 is: 302,775.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,474.20 : 639,419.70 = 201,942.20 : x
  2. Step 2: Convert to fraction form
    426,474.20/639,419.70 = 201,942.20/x
  3. Step 3: Cross multiply
    426,474.20x = 639,419.70 × 201,942.20
  4. Step 4: Simplify right side
    426,474.20x = 129,125,820,941.34
  5. Step 5: Solve for x
    x = 129,125,820,941.34/426,474.20
  6. Step 6: Final answer
    x = 302,775.22

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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.