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Finding the Fourth Proportional to 808,768.80, 1,213,639.20 and 335,404.80

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Solution

The fourth proportional to 808,768.80, 1,213,639.20 and 335,404.80 is: 503,308.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,768.80 : 1,213,639.20 = 335,404.80 : x
  2. Step 2: Convert to fraction form
    808,768.80/1,213,639.20 = 335,404.80/x
  3. Step 3: Cross multiply
    808,768.80x = 1,213,639.20 × 335,404.80
  4. Step 4: Simplify right side
    808,768.80x = 407,060,413,148.16
  5. Step 5: Solve for x
    x = 407,060,413,148.16/808,768.80
  6. Step 6: Final answer
    x = 503,308.75

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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.