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Finding the Fourth Proportional to 1,984,729.96, 2,978,079.63 and 786,625.75

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Solution

The fourth proportional to 1,984,729.96, 2,978,079.63 and 786,625.75 is: 1,180,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,729.96 : 2,978,079.63 = 786,625.75 : x
  2. Step 2: Convert to fraction form
    1,984,729.96/2,978,079.63 = 786,625.75/x
  3. Step 3: Cross multiply
    1,984,729.96x = 2,978,079.63 × 786,625.75
  4. Step 4: Simplify right side
    1,984,729.96x = 2,342,634,122,508.47
  5. Step 5: Solve for x
    x = 2,342,634,122,508.47/1,984,729.96
  6. Step 6: Final answer
    x = 1,180,328.90

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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.