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Finding the Fourth Proportional to 378,510.08, 522,355.57 and 217,397.43

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Solution

The fourth proportional to 378,510.08, 522,355.57 and 217,397.43 is: 300,015.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,510.08 : 522,355.57 = 217,397.43 : x
  2. Step 2: Convert to fraction form
    378,510.08/522,355.57 = 217,397.43/x
  3. Step 3: Cross multiply
    378,510.08x = 522,355.57 × 217,397.43
  4. Step 4: Simplify right side
    378,510.08x = 113,558,757,920.69
  5. Step 5: Solve for x
    x = 113,558,757,920.69/378,510.08
  6. Step 6: Final answer
    x = 300,015.15

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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.