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Finding the Fourth Proportional to 309,287.20, 463,930.80 and 247,079.20

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Solution

The fourth proportional to 309,287.20, 463,930.80 and 247,079.20 is: 370,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,287.20 : 463,930.80 = 247,079.20 : x
  2. Step 2: Convert to fraction form
    309,287.20/463,930.80 = 247,079.20/x
  3. Step 3: Cross multiply
    309,287.20x = 463,930.80 × 247,079.20
  4. Step 4: Simplify right side
    309,287.20x = 114,627,650,919.36
  5. Step 5: Solve for x
    x = 114,627,650,919.36/309,287.20
  6. Step 6: Final answer
    x = 370,618.80

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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.