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Finding the Fourth Proportional to 1,260,274.60, 1,890,584.70 and 418,738.60

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Solution

The fourth proportional to 1,260,274.60, 1,890,584.70 and 418,738.60 is: 628,165.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,274.60 : 1,890,584.70 = 418,738.60 : x
  2. Step 2: Convert to fraction form
    1,260,274.60/1,890,584.70 = 418,738.60/x
  3. Step 3: Cross multiply
    1,260,274.60x = 1,890,584.70 × 418,738.60
  4. Step 4: Simplify right side
    1,260,274.60x = 791,660,790,459.42
  5. Step 5: Solve for x
    x = 791,660,790,459.42/1,260,274.60
  6. Step 6: Final answer
    x = 628,165.31

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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.