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Finding the Fourth Proportional to 312,449.40, 430,911.90 and 244,360.80

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Solution

The fourth proportional to 312,449.40, 430,911.90 and 244,360.80 is: 337,008.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,449.40 : 430,911.90 = 244,360.80 : x
  2. Step 2: Convert to fraction form
    312,449.40/430,911.90 = 244,360.80/x
  3. Step 3: Cross multiply
    312,449.40x = 430,911.90 × 244,360.80
  4. Step 4: Simplify right side
    312,449.40x = 105,297,976,613.52
  5. Step 5: Solve for x
    x = 105,297,976,613.52/312,449.40
  6. Step 6: Final answer
    x = 337,008.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.