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Finding the Fourth Proportional to 339,741.40, 509,612.10 and 302,999.80

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Solution

The fourth proportional to 339,741.40, 509,612.10 and 302,999.80 is: 454,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,741.40 : 509,612.10 = 302,999.80 : x
  2. Step 2: Convert to fraction form
    339,741.40/509,612.10 = 302,999.80/x
  3. Step 3: Cross multiply
    339,741.40x = 509,612.10 × 302,999.80
  4. Step 4: Simplify right side
    339,741.40x = 154,412,364,377.58
  5. Step 5: Solve for x
    x = 154,412,364,377.58/339,741.40
  6. Step 6: Final answer
    x = 454,499.70

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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.