Home / 839,742.80-1,259,614.20-307,645.70

Finding the Fourth Proportional to 839,742.80, 1,259,614.20 and 307,645.70

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Solution

The fourth proportional to 839,742.80, 1,259,614.20 and 307,645.70 is: 461,468.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,742.80 : 1,259,614.20 = 307,645.70 : x
  2. Step 2: Convert to fraction form
    839,742.80/1,259,614.20 = 307,645.70/x
  3. Step 3: Cross multiply
    839,742.80x = 1,259,614.20 × 307,645.70
  4. Step 4: Simplify right side
    839,742.80x = 387,514,892,288.94
  5. Step 5: Solve for x
    x = 387,514,892,288.94/839,742.80
  6. Step 6: Final answer
    x = 461,468.55

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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.