Home / 2,129,478-3,192,642.36-1,287,842.64

Finding the Fourth Proportional to 2,129,478, 3,192,642.36 and 1,287,842.64

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Solution

The fourth proportional to 2,129,478, 3,192,642.36 and 1,287,842.64 is: 1,930,811.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129,478 : 3,192,642.36 = 1,287,842.64 : x
  2. Step 2: Convert to fraction form
    2,129,478/3,192,642.36 = 1,287,842.64/x
  3. Step 3: Cross multiply
    2,129,478x = 3,192,642.36 × 1,287,842.64
  4. Step 4: Simplify right side
    2,129,478x = 4,111,620,965,478.23
  5. Step 5: Solve for x
    x = 4,111,620,965,478.23/2,129,478
  6. Step 6: Final answer
    x = 1,930,811.67

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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.