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Finding the Fourth Proportional to 518,805.57, 715,949.31 and 286,226.18

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Solution

The fourth proportional to 518,805.57, 715,949.31 and 286,226.18 is: 394,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,805.57 : 715,949.31 = 286,226.18 : x
  2. Step 2: Convert to fraction form
    518,805.57/715,949.31 = 286,226.18/x
  3. Step 3: Cross multiply
    518,805.57x = 715,949.31 × 286,226.18
  4. Step 4: Simplify right side
    518,805.57x = 204,923,434,643.81
  5. Step 5: Solve for x
    x = 204,923,434,643.81/518,805.57
  6. Step 6: Final answer
    x = 394,990.81

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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.