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Finding the Fourth Proportional to 279,590.45, 418,970.96 and 205,355.57

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Solution

The fourth proportional to 279,590.45, 418,970.96 and 205,355.57 is: 307,728.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,590.45 : 418,970.96 = 205,355.57 : x
  2. Step 2: Convert to fraction form
    279,590.45/418,970.96 = 205,355.57/x
  3. Step 3: Cross multiply
    279,590.45x = 418,970.96 × 205,355.57
  4. Step 4: Simplify right side
    279,590.45x = 86,038,019,277.47
  5. Step 5: Solve for x
    x = 86,038,019,277.47/279,590.45
  6. Step 6: Final answer
    x = 307,728.75

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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.