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Finding the Fourth Proportional to 518,217, 715,318.44 and 303,426.12

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Solution

The fourth proportional to 518,217, 715,318.44 and 303,426.12 is: 418,832.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,217 : 715,318.44 = 303,426.12 : x
  2. Step 2: Convert to fraction form
    518,217/715,318.44 = 303,426.12/x
  3. Step 3: Cross multiply
    518,217x = 715,318.44 × 303,426.12
  4. Step 4: Simplify right side
    518,217x = 217,046,298,813.65
  5. Step 5: Solve for x
    x = 217,046,298,813.65/518,217
  6. Step 6: Final answer
    x = 418,832.84

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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.