Home / 1,315,280.40-1,969,421.40-839,389.20

Finding the Fourth Proportional to 1,315,280.40, 1,969,421.40 and 839,389.20

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Solution

The fourth proportional to 1,315,280.40, 1,969,421.40 and 839,389.20 is: 1,256,850.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,280.40 : 1,969,421.40 = 839,389.20 : x
  2. Step 2: Convert to fraction form
    1,315,280.40/1,969,421.40 = 839,389.20/x
  3. Step 3: Cross multiply
    1,315,280.40x = 1,969,421.40 × 839,389.20
  4. Step 4: Simplify right side
    1,315,280.40x = 1,653,111,053,408.88
  5. Step 5: Solve for x
    x = 1,653,111,053,408.88/1,315,280.40
  6. Step 6: Final answer
    x = 1,256,850.67

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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.