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Finding the Fourth Proportional to 1,322,560.78, 1,984,402.87 and 722,821.25

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Solution

The fourth proportional to 1,322,560.78, 1,984,402.87 and 722,821.25 is: 1,084,538.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322,560.78 : 1,984,402.87 = 722,821.25 : x
  2. Step 2: Convert to fraction form
    1,322,560.78/1,984,402.87 = 722,821.25/x
  3. Step 3: Cross multiply
    1,322,560.78x = 1,984,402.87 × 722,821.25
  4. Step 4: Simplify right side
    1,322,560.78x = 1,434,368,566,150.94
  5. Step 5: Solve for x
    x = 1,434,368,566,150.94/1,322,560.78
  6. Step 6: Final answer
    x = 1,084,538.87

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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.