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Finding the Fourth Proportional to 656,911.94, 906,539.81 and 355,105.94

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Solution

The fourth proportional to 656,911.94, 906,539.81 and 355,105.94 is: 490,046.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,911.94 : 906,539.81 = 355,105.94 : x
  2. Step 2: Convert to fraction form
    656,911.94/906,539.81 = 355,105.94/x
  3. Step 3: Cross multiply
    656,911.94x = 906,539.81 × 355,105.94
  4. Step 4: Simplify right side
    656,911.94x = 321,917,665,069.24
  5. Step 5: Solve for x
    x = 321,917,665,069.24/656,911.94
  6. Step 6: Final answer
    x = 490,046.91

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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.