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Finding the Fourth Proportional to 339,989.40, 509,984.10 and 303,247.80

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Solution

The fourth proportional to 339,989.40, 509,984.10 and 303,247.80 is: 454,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,989.40 : 509,984.10 = 303,247.80 : x
  2. Step 2: Convert to fraction form
    339,989.40/509,984.10 = 303,247.80/x
  3. Step 3: Cross multiply
    339,989.40x = 509,984.10 × 303,247.80
  4. Step 4: Simplify right side
    339,989.40x = 154,651,556,359.98
  5. Step 5: Solve for x
    x = 154,651,556,359.98/339,989.40
  6. Step 6: Final answer
    x = 454,871.70

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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.