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Finding the Fourth Proportional to 1,455,978.80, 2,183,968.20 and 1,323,009.20

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Solution

The fourth proportional to 1,455,978.80, 2,183,968.20 and 1,323,009.20 is: 1,984,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455,978.80 : 2,183,968.20 = 1,323,009.20 : x
  2. Step 2: Convert to fraction form
    1,455,978.80/2,183,968.20 = 1,323,009.20/x
  3. Step 3: Cross multiply
    1,455,978.80x = 2,183,968.20 × 1,323,009.20
  4. Step 4: Simplify right side
    1,455,978.80x = 2,889,410,021,107.44
  5. Step 5: Solve for x
    x = 2,889,410,021,107.44/1,455,978.80
  6. Step 6: Final answer
    x = 1,984,513.80

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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.