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Finding the Fourth Proportional to 693,894.45, 957,610.89 and 421,917.30

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Solution

The fourth proportional to 693,894.45, 957,610.89 and 421,917.30 is: 582,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,894.45 : 957,610.89 = 421,917.30 : x
  2. Step 2: Convert to fraction form
    693,894.45/957,610.89 = 421,917.30/x
  3. Step 3: Cross multiply
    693,894.45x = 957,610.89 × 421,917.30
  4. Step 4: Simplify right side
    693,894.45x = 404,032,601,159.40
  5. Step 5: Solve for x
    x = 404,032,601,159.40/693,894.45
  6. Step 6: Final answer
    x = 582,268.10

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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.