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Finding the Fourth Proportional to 668,109.80, 922,029.20 and 396,338.60

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Solution

The fourth proportional to 668,109.80, 922,029.20 and 396,338.60 is: 546,969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,109.80 : 922,029.20 = 396,338.60 : x
  2. Step 2: Convert to fraction form
    668,109.80/922,029.20 = 396,338.60/x
  3. Step 3: Cross multiply
    668,109.80x = 922,029.20 × 396,338.60
  4. Step 4: Simplify right side
    668,109.80x = 365,435,762,287.12
  5. Step 5: Solve for x
    x = 365,435,762,287.12/668,109.80
  6. Step 6: Final answer
    x = 546,969.62

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1.5x scale

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.