Home / 641,421.26-962,121.57-220,700.78

Finding the Fourth Proportional to 641,421.26, 962,121.57 and 220,700.78

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Solution

The fourth proportional to 641,421.26, 962,121.57 and 220,700.78 is: 331,047.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,421.26 : 962,121.57 = 220,700.78 : x
  2. Step 2: Convert to fraction form
    641,421.26/962,121.57 = 220,700.78/x
  3. Step 3: Cross multiply
    641,421.26x = 962,121.57 × 220,700.78
  4. Step 4: Simplify right side
    641,421.26x = 212,340,980,953.83
  5. Step 5: Solve for x
    x = 212,340,980,953.83/641,421.26
  6. Step 6: Final answer
    x = 331,047.62

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1.5x scale

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.