Home / 1,281,286.80-1,921,930.20-810,061.20

Finding the Fourth Proportional to 1,281,286.80, 1,921,930.20 and 810,061.20

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Solution

The fourth proportional to 1,281,286.80, 1,921,930.20 and 810,061.20 is: 1,215,091.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,286.80 : 1,921,930.20 = 810,061.20 : x
  2. Step 2: Convert to fraction form
    1,281,286.80/1,921,930.20 = 810,061.20/x
  3. Step 3: Cross multiply
    1,281,286.80x = 1,921,930.20 × 810,061.20
  4. Step 4: Simplify right side
    1,281,286.80x = 1,556,881,084,128.24
  5. Step 5: Solve for x
    x = 1,556,881,084,128.24/1,281,286.80
  6. Step 6: Final answer
    x = 1,215,091.80

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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.