Home / 1,098,994.20-1,648,491.30-780,129.60

Finding the Fourth Proportional to 1,098,994.20, 1,648,491.30 and 780,129.60

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Solution

The fourth proportional to 1,098,994.20, 1,648,491.30 and 780,129.60 is: 1,170,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,994.20 : 1,648,491.30 = 780,129.60 : x
  2. Step 2: Convert to fraction form
    1,098,994.20/1,648,491.30 = 780,129.60/x
  3. Step 3: Cross multiply
    1,098,994.20x = 1,648,491.30 × 780,129.60
  4. Step 4: Simplify right side
    1,098,994.20x = 1,286,036,858,472.48
  5. Step 5: Solve for x
    x = 1,286,036,858,472.48/1,098,994.20
  6. Step 6: Final answer
    x = 1,170,194.40

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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.