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Finding the Fourth Proportional to 272,286.60, 408,429.90 and 260,039.40

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Solution

The fourth proportional to 272,286.60, 408,429.90 and 260,039.40 is: 390,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,286.60 : 408,429.90 = 260,039.40 : x
  2. Step 2: Convert to fraction form
    272,286.60/408,429.90 = 260,039.40/x
  3. Step 3: Cross multiply
    272,286.60x = 408,429.90 × 260,039.40
  4. Step 4: Simplify right side
    272,286.60x = 106,207,866,138.06
  5. Step 5: Solve for x
    x = 106,207,866,138.06/272,286.60
  6. Step 6: Final answer
    x = 390,059.10

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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.