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Finding the Fourth Proportional to 340,013.64, 509,553.90 and 215,131.08

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Solution

The fourth proportional to 340,013.64, 509,553.90 and 215,131.08 is: 322,401.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,013.64 : 509,553.90 = 215,131.08 : x
  2. Step 2: Convert to fraction form
    340,013.64/509,553.90 = 215,131.08/x
  3. Step 3: Cross multiply
    340,013.64x = 509,553.90 × 215,131.08
  4. Step 4: Simplify right side
    340,013.64x = 109,620,880,825.21
  5. Step 5: Solve for x
    x = 109,620,880,825.21/340,013.64
  6. Step 6: Final answer
    x = 322,401.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.