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Finding the Fourth Proportional to 1,433,935.44, 1,978,865.64 and 789,376.32

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Solution

The fourth proportional to 1,433,935.44, 1,978,865.64 and 789,376.32 is: 1,089,358.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,935.44 : 1,978,865.64 = 789,376.32 : x
  2. Step 2: Convert to fraction form
    1,433,935.44/1,978,865.64 = 789,376.32/x
  3. Step 3: Cross multiply
    1,433,935.44x = 1,978,865.64 × 789,376.32
  4. Step 4: Simplify right side
    1,433,935.44x = 1,562,069,676,677.64
  5. Step 5: Solve for x
    x = 1,562,069,676,677.64/1,433,935.44
  6. Step 6: Final answer
    x = 1,089,358.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.