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Finding the Fourth Proportional to 656,976, 906,626.88 and 355,170

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Solution

The fourth proportional to 656,976, 906,626.88 and 355,170 is: 490,134.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,976 : 906,626.88 = 355,170 : x
  2. Step 2: Convert to fraction form
    656,976/906,626.88 = 355,170/x
  3. Step 3: Cross multiply
    656,976x = 906,626.88 × 355,170
  4. Step 4: Simplify right side
    656,976x = 322,006,668,969.60
  5. Step 5: Solve for x
    x = 322,006,668,969.60/656,976
  6. Step 6: Final answer
    x = 490,134.60

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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.