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Finding the Fourth Proportional to 518,015.20, 777,022.80 and 307,544.80

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Solution

The fourth proportional to 518,015.20, 777,022.80 and 307,544.80 is: 461,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,015.20 : 777,022.80 = 307,544.80 : x
  2. Step 2: Convert to fraction form
    518,015.20/777,022.80 = 307,544.80/x
  3. Step 3: Cross multiply
    518,015.20x = 777,022.80 × 307,544.80
  4. Step 4: Simplify right side
    518,015.20x = 238,969,321,621.44
  5. Step 5: Solve for x
    x = 238,969,321,621.44/518,015.20
  6. Step 6: Final answer
    x = 461,317.20

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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.