Home / 1,420,128.78-1,959,793.31-775,567.93

Finding the Fourth Proportional to 1,420,128.78, 1,959,793.31 and 775,567.93

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Solution

The fourth proportional to 1,420,128.78, 1,959,793.31 and 775,567.93 is: 1,070,292.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,128.78 : 1,959,793.31 = 775,567.93 : x
  2. Step 2: Convert to fraction form
    1,420,128.78/1,959,793.31 = 775,567.93/x
  3. Step 3: Cross multiply
    1,420,128.78x = 1,959,793.31 × 775,567.93
  4. Step 4: Simplify right side
    1,420,128.78x = 1,519,952,840,664.55
  5. Step 5: Solve for x
    x = 1,519,952,840,664.55/1,420,128.78
  6. Step 6: Final answer
    x = 1,070,292.26

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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.