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Finding the Fourth Proportional to 339,991.40, 509,987.10 and 303,249.80

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Solution

The fourth proportional to 339,991.40, 509,987.10 and 303,249.80 is: 454,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,991.40 : 509,987.10 = 303,249.80 : x
  2. Step 2: Convert to fraction form
    339,991.40/509,987.10 = 303,249.80/x
  3. Step 3: Cross multiply
    339,991.40x = 509,987.10 × 303,249.80
  4. Step 4: Simplify right side
    339,991.40x = 154,653,486,077.58
  5. Step 5: Solve for x
    x = 154,653,486,077.58/339,991.40
  6. Step 6: Final answer
    x = 454,874.70

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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.