Home / 1,215,243.90-1,819,366.65-1,089,272.70

Finding the Fourth Proportional to 1,215,243.90, 1,819,366.65 and 1,089,272.70

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Solution

The fourth proportional to 1,215,243.90, 1,819,366.65 and 1,089,272.70 is: 1,630,772.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,243.90 : 1,819,366.65 = 1,089,272.70 : x
  2. Step 2: Convert to fraction form
    1,215,243.90/1,819,366.65 = 1,089,272.70/x
  3. Step 3: Cross multiply
    1,215,243.90x = 1,819,366.65 × 1,089,272.70
  4. Step 4: Simplify right side
    1,215,243.90x = 1,981,786,423,135.45
  5. Step 5: Solve for x
    x = 1,981,786,423,135.45/1,215,243.90
  6. Step 6: Final answer
    x = 1,630,772.57

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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.