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Finding the Fourth Proportional to 808,910.70, 1,213,803.45 and 335,643.90

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Solution

The fourth proportional to 808,910.70, 1,213,803.45 and 335,643.90 is: 503,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,910.70 : 1,213,803.45 = 335,643.90 : x
  2. Step 2: Convert to fraction form
    808,910.70/1,213,803.45 = 335,643.90/x
  3. Step 3: Cross multiply
    808,910.70x = 1,213,803.45 × 335,643.90
  4. Step 4: Simplify right side
    808,910.70x = 407,405,723,791.46
  5. Step 5: Solve for x
    x = 407,405,723,791.46/808,910.70
  6. Step 6: Final answer
    x = 503,647.34

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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.