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Finding the Fourth Proportional to 308,420.82, 425,490.39 and 206,479.08

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Solution

The fourth proportional to 308,420.82, 425,490.39 and 206,479.08 is: 284,853.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,420.82 : 425,490.39 = 206,479.08 : x
  2. Step 2: Convert to fraction form
    308,420.82/425,490.39 = 206,479.08/x
  3. Step 3: Cross multiply
    308,420.82x = 425,490.39 × 206,479.08
  4. Step 4: Simplify right side
    308,420.82x = 87,854,864,276.04
  5. Step 5: Solve for x
    x = 87,854,864,276.04/308,420.82
  6. Step 6: Final answer
    x = 284,853.87

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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.