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Finding the Fourth Proportional to 306,404.22, 422,665.14 and 183,864.90

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Solution

The fourth proportional to 306,404.22, 422,665.14 and 183,864.90 is: 253,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,404.22 : 422,665.14 = 183,864.90 : x
  2. Step 2: Convert to fraction form
    306,404.22/422,665.14 = 183,864.90/x
  3. Step 3: Cross multiply
    306,404.22x = 422,665.14 × 183,864.90
  4. Step 4: Simplify right side
    306,404.22x = 77,713,283,699.59
  5. Step 5: Solve for x
    x = 77,713,283,699.59/306,404.22
  6. Step 6: Final answer
    x = 253,629.94

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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.