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Finding the Fourth Proportional to 353,323.35, 487,414.53 and 209,981.97

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Solution

The fourth proportional to 353,323.35, 487,414.53 and 209,981.97 is: 289,673.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,323.35 : 487,414.53 = 209,981.97 : x
  2. Step 2: Convert to fraction form
    353,323.35/487,414.53 = 209,981.97/x
  3. Step 3: Cross multiply
    353,323.35x = 487,414.53 × 209,981.97
  4. Step 4: Simplify right side
    353,323.35x = 102,348,263,216.02
  5. Step 5: Solve for x
    x = 102,348,263,216.02/353,323.35
  6. Step 6: Final answer
    x = 289,673.08

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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.