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Finding the Fourth Proportional to 3,987,321.60, 5,982,364.80 and 1,745,068.80

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Solution

The fourth proportional to 3,987,321.60, 5,982,364.80 and 1,745,068.80 is: 2,618,208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987,321.60 : 5,982,364.80 = 1,745,068.80 : x
  2. Step 2: Convert to fraction form
    3,987,321.60/5,982,364.80 = 1,745,068.80/x
  3. Step 3: Cross multiply
    3,987,321.60x = 5,982,364.80 × 1,745,068.80
  4. Step 4: Simplify right side
    3,987,321.60x = 10,439,638,162,698.24
  5. Step 5: Solve for x
    x = 10,439,638,162,698.24/3,987,321.60
  6. Step 6: Final answer
    x = 2,618,208.21

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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.