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Finding the Fourth Proportional to 1,984,728.96, 2,978,078.13 and 786,624.75

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Solution

The fourth proportional to 1,984,728.96, 2,978,078.13 and 786,624.75 is: 1,180,327.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,728.96 : 2,978,078.13 = 786,624.75 : x
  2. Step 2: Convert to fraction form
    1,984,728.96/2,978,078.13 = 786,624.75/x
  3. Step 3: Cross multiply
    1,984,728.96x = 2,978,078.13 × 786,624.75
  4. Step 4: Simplify right side
    1,984,728.96x = 2,342,629,964,491.72
  5. Step 5: Solve for x
    x = 2,342,629,964,491.72/1,984,728.96
  6. Step 6: Final answer
    x = 1,180,327.40

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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.