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Finding the Fourth Proportional to 426,472.20, 639,416.70 and 201,940.20

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Solution

The fourth proportional to 426,472.20, 639,416.70 and 201,940.20 is: 302,772.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,472.20 : 639,416.70 = 201,940.20 : x
  2. Step 2: Convert to fraction form
    426,472.20/639,416.70 = 201,940.20/x
  3. Step 3: Cross multiply
    426,472.20x = 639,416.70 × 201,940.20
  4. Step 4: Simplify right side
    426,472.20x = 129,123,936,281.34
  5. Step 5: Solve for x
    x = 129,123,936,281.34/426,472.20
  6. Step 6: Final answer
    x = 302,772.22

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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.