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Finding the Fourth Proportional to 518,229, 715,335 and 303,438.12

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Solution

The fourth proportional to 518,229, 715,335 and 303,438.12 is: 418,849.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,229 : 715,335 = 303,438.12 : x
  2. Step 2: Convert to fraction form
    518,229/715,335 = 303,438.12/x
  3. Step 3: Cross multiply
    518,229x = 715,335 × 303,438.12
  4. Step 4: Simplify right side
    518,229x = 217,059,907,570.20
  5. Step 5: Solve for x
    x = 217,059,907,570.20/518,229
  6. Step 6: Final answer
    x = 418,849.40

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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.