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Finding the Fourth Proportional to 408,318.63, 563,396.85 and 238,519.95

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Solution

The fourth proportional to 408,318.63, 563,396.85 and 238,519.95 is: 329,109.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,318.63 : 563,396.85 = 238,519.95 : x
  2. Step 2: Convert to fraction form
    408,318.63/563,396.85 = 238,519.95/x
  3. Step 3: Cross multiply
    408,318.63x = 563,396.85 × 238,519.95
  4. Step 4: Simplify right side
    408,318.63x = 134,381,388,492.16
  5. Step 5: Solve for x
    x = 134,381,388,492.16/408,318.63
  6. Step 6: Final answer
    x = 329,109.13

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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.