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Finding the Fourth Proportional to 518,990.82, 716,278.86 and 304,216.62

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Solution

The fourth proportional to 518,990.82, 716,278.86 and 304,216.62 is: 419,860.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,990.82 : 716,278.86 = 304,216.62 : x
  2. Step 2: Convert to fraction form
    518,990.82/716,278.86 = 304,216.62/x
  3. Step 3: Cross multiply
    518,990.82x = 716,278.86 × 304,216.62
  4. Step 4: Simplify right side
    518,990.82x = 217,903,933,766.65
  5. Step 5: Solve for x
    x = 217,903,933,766.65/518,990.82
  6. Step 6: Final answer
    x = 419,860.86

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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.