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Finding the Fourth Proportional to 1,984,911.90, 2,978,145.45 and 786,630.30

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Solution

The fourth proportional to 1,984,911.90, 2,978,145.45 and 786,630.30 is: 1,180,253.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,911.90 : 2,978,145.45 = 786,630.30 : x
  2. Step 2: Convert to fraction form
    1,984,911.90/2,978,145.45 = 786,630.30/x
  3. Step 3: Cross multiply
    1,984,911.90x = 2,978,145.45 × 786,630.30
  4. Step 4: Simplify right side
    1,984,911.90x = 2,342,699,448,777.14
  5. Step 5: Solve for x
    x = 2,342,699,448,777.14/1,984,911.90
  6. Step 6: Final answer
    x = 1,180,253.62

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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.