Home / 1,131,330.20-1,561,268.14-689,830.65

Finding the Fourth Proportional to 1,131,330.20, 1,561,268.14 and 689,830.65

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Solution

The fourth proportional to 1,131,330.20, 1,561,268.14 and 689,830.65 is: 951,986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131,330.20 : 1,561,268.14 = 689,830.65 : x
  2. Step 2: Convert to fraction form
    1,131,330.20/1,561,268.14 = 689,830.65/x
  3. Step 3: Cross multiply
    1,131,330.20x = 1,561,268.14 × 689,830.65
  4. Step 4: Simplify right side
    1,131,330.20x = 1,077,010,615,840.49
  5. Step 5: Solve for x
    x = 1,077,010,615,840.49/1,131,330.20
  6. Step 6: Final answer
    x = 951,986.09

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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.