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Finding the Fourth Proportional to 656,872.44, 906,483.57 and 355,066.44

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Solution

The fourth proportional to 656,872.44, 906,483.57 and 355,066.44 is: 489,991.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,872.44 : 906,483.57 = 355,066.44 : x
  2. Step 2: Convert to fraction form
    656,872.44/906,483.57 = 355,066.44/x
  3. Step 3: Cross multiply
    656,872.44x = 906,483.57 × 355,066.44
  4. Step 4: Simplify right side
    656,872.44x = 321,861,892,786.89
  5. Step 5: Solve for x
    x = 321,861,892,786.89/656,872.44
  6. Step 6: Final answer
    x = 489,991.47

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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.