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Finding the Fourth Proportional to 413,688.40, 620,640.60 and 133,212.40

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Solution

The fourth proportional to 413,688.40, 620,640.60 and 133,212.40 is: 199,853.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,688.40 : 620,640.60 = 133,212.40 : x
  2. Step 2: Convert to fraction form
    413,688.40/620,640.60 = 133,212.40/x
  3. Step 3: Cross multiply
    413,688.40x = 620,640.60 × 133,212.40
  4. Step 4: Simplify right side
    413,688.40x = 82,677,023,863.44
  5. Step 5: Solve for x
    x = 82,677,023,863.44/413,688.40
  6. Step 6: Final answer
    x = 199,853.38

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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.