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Finding the Fourth Proportional to 1,434,176.16, 1,979,147.16 and 789,583.02

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Solution

The fourth proportional to 1,434,176.16, 1,979,147.16 and 789,583.02 is: 1,089,615.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434,176.16 : 1,979,147.16 = 789,583.02 : x
  2. Step 2: Convert to fraction form
    1,434,176.16/1,979,147.16 = 789,583.02/x
  3. Step 3: Cross multiply
    1,434,176.16x = 1,979,147.16 × 789,583.02
  4. Step 4: Simplify right side
    1,434,176.16x = 1,562,700,991,617.22
  5. Step 5: Solve for x
    x = 1,562,700,991,617.22/1,434,176.16
  6. Step 6: Final answer
    x = 1,089,615.79

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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.