Home / 1,222,140.60-1,833,209.28-689,419.80

Finding the Fourth Proportional to 1,222,140.60, 1,833,209.28 and 689,419.80

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Solution

The fourth proportional to 1,222,140.60, 1,833,209.28 and 689,419.80 is: 1,034,128.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,140.60 : 1,833,209.28 = 689,419.80 : x
  2. Step 2: Convert to fraction form
    1,222,140.60/1,833,209.28 = 689,419.80/x
  3. Step 3: Cross multiply
    1,222,140.60x = 1,833,209.28 × 689,419.80
  4. Step 4: Simplify right side
    1,222,140.60x = 1,263,850,775,175.74
  5. Step 5: Solve for x
    x = 1,263,850,775,175.74/1,222,140.60
  6. Step 6: Final answer
    x = 1,034,128.79

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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.