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Finding the Fourth Proportional to 1,434,403.64, 1,979,477.02 and 789,822.28

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Solution

The fourth proportional to 1,434,403.64, 1,979,477.02 and 789,822.28 is: 1,089,954.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434,403.64 : 1,979,477.02 = 789,822.28 : x
  2. Step 2: Convert to fraction form
    1,434,403.64/1,979,477.02 = 789,822.28/x
  3. Step 3: Cross multiply
    1,434,403.64x = 1,979,477.02 × 789,822.28
  4. Step 4: Simplify right side
    1,434,403.64x = 1,563,435,053,144.01
  5. Step 5: Solve for x
    x = 1,563,435,053,144.01/1,434,403.64
  6. Step 6: Final answer
    x = 1,089,954.74

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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.