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Finding the Fourth Proportional to 212,408.10, 318,612.15 and 203,307.30

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Solution

The fourth proportional to 212,408.10, 318,612.15 and 203,307.30 is: 304,960.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,408.10 : 318,612.15 = 203,307.30 : x
  2. Step 2: Convert to fraction form
    212,408.10/318,612.15 = 203,307.30/x
  3. Step 3: Cross multiply
    212,408.10x = 318,612.15 × 203,307.30
  4. Step 4: Simplify right side
    212,408.10x = 64,776,175,963.70
  5. Step 5: Solve for x
    x = 64,776,175,963.70/212,408.10
  6. Step 6: Final answer
    x = 304,960.95

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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.