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Finding the Fourth Proportional to 518,183.47, 715,074.31 and 288,728.90

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Solution

The fourth proportional to 518,183.47, 715,074.31 and 288,728.90 is: 398,435.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,183.47 : 715,074.31 = 288,728.90 : x
  2. Step 2: Convert to fraction form
    518,183.47/715,074.31 = 288,728.90/x
  3. Step 3: Cross multiply
    518,183.47x = 715,074.31 × 288,728.90
  4. Step 4: Simplify right side
    518,183.47x = 206,462,618,944.56
  5. Step 5: Solve for x
    x = 206,462,618,944.56/518,183.47
  6. Step 6: Final answer
    x = 398,435.36

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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.