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Finding the Fourth Proportional to 445,039.76, 613,949 and 394,104.40

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Solution

The fourth proportional to 445,039.76, 613,949 and 394,104.40 is: 543,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,039.76 : 613,949 = 394,104.40 : x
  2. Step 2: Convert to fraction form
    445,039.76/613,949 = 394,104.40/x
  3. Step 3: Cross multiply
    445,039.76x = 613,949 × 394,104.40
  4. Step 4: Simplify right side
    445,039.76x = 241,960,002,275.60
  5. Step 5: Solve for x
    x = 241,960,002,275.60/445,039.76
  6. Step 6: Final answer
    x = 543,681.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.