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Finding the Fourth Proportional to 426,472.70, 639,417.45 and 201,940.70

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Solution

The fourth proportional to 426,472.70, 639,417.45 and 201,940.70 is: 302,772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,472.70 : 639,417.45 = 201,940.70 : x
  2. Step 2: Convert to fraction form
    426,472.70/639,417.45 = 201,940.70/x
  3. Step 3: Cross multiply
    426,472.70x = 639,417.45 × 201,940.70
  4. Step 4: Simplify right side
    426,472.70x = 129,124,407,445.22
  5. Step 5: Solve for x
    x = 129,124,407,445.22/426,472.70
  6. Step 6: Final answer
    x = 302,772.97

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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.