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Finding the Fourth Proportional to 518,489.56, 715,515.54 and 280,025.56

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Solution

The fourth proportional to 518,489.56, 715,515.54 and 280,025.56 is: 386,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,489.56 : 715,515.54 = 280,025.56 : x
  2. Step 2: Convert to fraction form
    518,489.56/715,515.54 = 280,025.56/x
  3. Step 3: Cross multiply
    518,489.56x = 715,515.54 × 280,025.56
  4. Step 4: Simplify right side
    518,489.56x = 200,362,639,777.20
  5. Step 5: Solve for x
    x = 200,362,639,777.20/518,489.56
  6. Step 6: Final answer
    x = 386,435.24

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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.