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Finding the Fourth Proportional to 353,619.78, 488,089.15 and 217,767.62

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Solution

The fourth proportional to 353,619.78, 488,089.15 and 217,767.62 is: 300,577.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,619.78 : 488,089.15 = 217,767.62 : x
  2. Step 2: Convert to fraction form
    353,619.78/488,089.15 = 217,767.62/x
  3. Step 3: Cross multiply
    353,619.78x = 488,089.15 × 217,767.62
  4. Step 4: Simplify right side
    353,619.78x = 106,290,013,219.13
  5. Step 5: Solve for x
    x = 106,290,013,219.13/353,619.78
  6. Step 6: Final answer
    x = 300,577.12

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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.