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Finding the Fourth Proportional to 378,119.63, 521,816.22 and 208,364.69

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Solution

The fourth proportional to 378,119.63, 521,816.22 and 208,364.69 is: 287,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,119.63 : 521,816.22 = 208,364.69 : x
  2. Step 2: Convert to fraction form
    378,119.63/521,816.22 = 208,364.69/x
  3. Step 3: Cross multiply
    378,119.63x = 521,816.22 × 208,364.69
  4. Step 4: Simplify right side
    378,119.63x = 108,728,072,308.19
  5. Step 5: Solve for x
    x = 108,728,072,308.19/378,119.63
  6. Step 6: Final answer
    x = 287,549.40

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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.