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Finding the Fourth Proportional to 613,979.48, 847,315.13 and 355,864.88

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Solution

The fourth proportional to 613,979.48, 847,315.13 and 355,864.88 is: 491,107.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,979.48 : 847,315.13 = 355,864.88 : x
  2. Step 2: Convert to fraction form
    613,979.48/847,315.13 = 355,864.88/x
  3. Step 3: Cross multiply
    613,979.48x = 847,315.13 × 355,864.88
  4. Step 4: Simplify right side
    613,979.48x = 301,529,691,043.73
  5. Step 5: Solve for x
    x = 301,529,691,043.73/613,979.48
  6. Step 6: Final answer
    x = 491,107.12

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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.