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Finding the Fourth Proportional to 1,433,966.80, 1,978,899.52 and 780,611.72

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Solution

The fourth proportional to 1,433,966.80, 1,978,899.52 and 780,611.72 is: 1,077,257.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,966.80 : 1,978,899.52 = 780,611.72 : x
  2. Step 2: Convert to fraction form
    1,433,966.80/1,978,899.52 = 780,611.72/x
  3. Step 3: Cross multiply
    1,433,966.80x = 1,978,899.52 × 780,611.72
  4. Step 4: Simplify right side
    1,433,966.80x = 1,544,752,158,014.37
  5. Step 5: Solve for x
    x = 1,544,752,158,014.37/1,433,966.80
  6. Step 6: Final answer
    x = 1,077,257.97

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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.