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Finding the Fourth Proportional to 451,482.12, 622,919.22 and 355,691.48

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Solution

The fourth proportional to 451,482.12, 622,919.22 and 355,691.48 is: 490,754.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,482.12 : 622,919.22 = 355,691.48 : x
  2. Step 2: Convert to fraction form
    451,482.12/622,919.22 = 355,691.48/x
  3. Step 3: Cross multiply
    451,482.12x = 622,919.22 × 355,691.48
  4. Step 4: Simplify right side
    451,482.12x = 221,567,059,282.25
  5. Step 5: Solve for x
    x = 221,567,059,282.25/451,482.12
  6. Step 6: Final answer
    x = 490,754.89

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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.