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Finding the Fourth Proportional to 289,266.40, 434,115.60 and 148,952.80

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Solution

The fourth proportional to 289,266.40, 434,115.60 and 148,952.80 is: 223,540.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,266.40 : 434,115.60 = 148,952.80 : x
  2. Step 2: Convert to fraction form
    289,266.40/434,115.60 = 148,952.80/x
  3. Step 3: Cross multiply
    289,266.40x = 434,115.60 × 148,952.80
  4. Step 4: Simplify right side
    289,266.40x = 64,662,734,143.68
  5. Step 5: Solve for x
    x = 64,662,734,143.68/289,266.40
  6. Step 6: Final answer
    x = 223,540.43

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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.