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Finding the Fourth Proportional to 289,679.40, 434,519.10 and 245,939.40

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Solution

The fourth proportional to 289,679.40, 434,519.10 and 245,939.40 is: 368,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,679.40 : 434,519.10 = 245,939.40 : x
  2. Step 2: Convert to fraction form
    289,679.40/434,519.10 = 245,939.40/x
  3. Step 3: Cross multiply
    289,679.40x = 434,519.10 × 245,939.40
  4. Step 4: Simplify right side
    289,679.40x = 106,865,366,742.54
  5. Step 5: Solve for x
    x = 106,865,366,742.54/289,679.40
  6. Step 6: Final answer
    x = 368,909.10

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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.