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Finding the Fourth Proportional to 378,673.90, 521,956.72 and 329,489.64

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Solution

The fourth proportional to 378,673.90, 521,956.72 and 329,489.64 is: 454,162.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,673.90 : 521,956.72 = 329,489.64 : x
  2. Step 2: Convert to fraction form
    378,673.90/521,956.72 = 329,489.64/x
  3. Step 3: Cross multiply
    378,673.90x = 521,956.72 × 329,489.64
  4. Step 4: Simplify right side
    378,673.90x = 171,979,331,768.38
  5. Step 5: Solve for x
    x = 171,979,331,768.38/378,673.90
  6. Step 6: Final answer
    x = 454,162.10

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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.