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Finding the Fourth Proportional to 1,984,970.94, 2,977,751.67 and 920,120.64

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Solution

The fourth proportional to 1,984,970.94, 2,977,751.67 and 920,120.64 is: 1,380,317.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,970.94 : 2,977,751.67 = 920,120.64 : x
  2. Step 2: Convert to fraction form
    1,984,970.94/2,977,751.67 = 920,120.64/x
  3. Step 3: Cross multiply
    1,984,970.94x = 2,977,751.67 × 920,120.64
  4. Step 4: Simplify right side
    1,984,970.94x = 2,739,890,772,361.47
  5. Step 5: Solve for x
    x = 2,739,890,772,361.47/1,984,970.94
  6. Step 6: Final answer
    x = 1,380,317.83

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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.