Home / 1,288,200.90-1,932,301.35-990,185.70

Finding the Fourth Proportional to 1,288,200.90, 1,932,301.35 and 990,185.70

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Solution

The fourth proportional to 1,288,200.90, 1,932,301.35 and 990,185.70 is: 1,485,278.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,200.90 : 1,932,301.35 = 990,185.70 : x
  2. Step 2: Convert to fraction form
    1,288,200.90/1,932,301.35 = 990,185.70/x
  3. Step 3: Cross multiply
    1,288,200.90x = 1,932,301.35 × 990,185.70
  4. Step 4: Simplify right side
    1,288,200.90x = 1,913,337,164,860.70
  5. Step 5: Solve for x
    x = 1,913,337,164,860.70/1,288,200.90
  6. Step 6: Final answer
    x = 1,485,278.55

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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.