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Finding the Fourth Proportional to 1,978,692.46, 2,726,863.71 and 1,585,779.12

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Solution

The fourth proportional to 1,978,692.46, 2,726,863.71 and 1,585,779.12 is: 2,185,384.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,692.46 : 2,726,863.71 = 1,585,779.12 : x
  2. Step 2: Convert to fraction form
    1,978,692.46/2,726,863.71 = 1,585,779.12/x
  3. Step 3: Cross multiply
    1,978,692.46x = 2,726,863.71 × 1,585,779.12
  4. Step 4: Simplify right side
    1,978,692.46x = 4,324,203,534,403.74
  5. Step 5: Solve for x
    x = 4,324,203,534,403.74/1,978,692.46
  6. Step 6: Final answer
    x = 2,185,384.35

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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.