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Finding the Fourth Proportional to 305,423.70, 459,119.70 and 217,287.60

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Solution

The fourth proportional to 305,423.70, 459,119.70 and 217,287.60 is: 326,631.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,423.70 : 459,119.70 = 217,287.60 : x
  2. Step 2: Convert to fraction form
    305,423.70/459,119.70 = 217,287.60/x
  3. Step 3: Cross multiply
    305,423.70x = 459,119.70 × 217,287.60
  4. Step 4: Simplify right side
    305,423.70x = 99,761,017,725.72
  5. Step 5: Solve for x
    x = 99,761,017,725.72/305,423.70
  6. Step 6: Final answer
    x = 326,631.55

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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.