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Finding the Fourth Proportional to 212,964.40, 319,446.60 and 193,281.40

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Solution

The fourth proportional to 212,964.40, 319,446.60 and 193,281.40 is: 289,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,964.40 : 319,446.60 = 193,281.40 : x
  2. Step 2: Convert to fraction form
    212,964.40/319,446.60 = 193,281.40/x
  3. Step 3: Cross multiply
    212,964.40x = 319,446.60 × 193,281.40
  4. Step 4: Simplify right side
    212,964.40x = 61,743,086,073.24
  5. Step 5: Solve for x
    x = 61,743,086,073.24/212,964.40
  6. Step 6: Final answer
    x = 289,922.10

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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.