Home / 1,330,250.40-1,991,228.40-1,288,778.40

Finding the Fourth Proportional to 1,330,250.40, 1,991,228.40 and 1,288,778.40

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Solution

The fourth proportional to 1,330,250.40, 1,991,228.40 and 1,288,778.40 is: 1,929,149.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,250.40 : 1,991,228.40 = 1,288,778.40 : x
  2. Step 2: Convert to fraction form
    1,330,250.40/1,991,228.40 = 1,288,778.40/x
  3. Step 3: Cross multiply
    1,330,250.40x = 1,991,228.40 × 1,288,778.40
  4. Step 4: Simplify right side
    1,330,250.40x = 2,566,252,151,386.56
  5. Step 5: Solve for x
    x = 2,566,252,151,386.56/1,330,250.40
  6. Step 6: Final answer
    x = 1,929,149.69

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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.