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Finding the Fourth Proportional to 839,662.80, 1,259,494.20 and 307,201.20

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Solution

The fourth proportional to 839,662.80, 1,259,494.20 and 307,201.20 is: 460,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,662.80 : 1,259,494.20 = 307,201.20 : x
  2. Step 2: Convert to fraction form
    839,662.80/1,259,494.20 = 307,201.20/x
  3. Step 3: Cross multiply
    839,662.80x = 1,259,494.20 × 307,201.20
  4. Step 4: Simplify right side
    839,662.80x = 386,918,129,633.04
  5. Step 5: Solve for x
    x = 386,918,129,633.04/839,662.80
  6. Step 6: Final answer
    x = 460,801.80

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Double scale
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Similar ratio
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1.5x scale

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.