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Finding the Fourth Proportional to 386,843.40, 579,643.02 and 324,635.40

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Solution

The fourth proportional to 386,843.40, 579,643.02 and 324,635.40 is: 486,431.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,843.40 : 579,643.02 = 324,635.40 : x
  2. Step 2: Convert to fraction form
    386,843.40/579,643.02 = 324,635.40/x
  3. Step 3: Cross multiply
    386,843.40x = 579,643.02 × 324,635.40
  4. Step 4: Simplify right side
    386,843.40x = 188,172,643,654.91
  5. Step 5: Solve for x
    x = 188,172,643,654.91/386,843.40
  6. Step 6: Final answer
    x = 486,431.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.