Home / 1,909.90-2,636.40-1,246.51

Finding the Fourth Proportional to 1,909.90, 2,636.40 and 1,246.51

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Solution

The fourth proportional to 1,909.90, 2,636.40 and 1,246.51 is: 1,720.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.90 : 2,636.40 = 1,246.51 : x
  2. Step 2: Convert to fraction form
    1,909.90/2,636.40 = 1,246.51/x
  3. Step 3: Cross multiply
    1,909.90x = 2,636.40 × 1,246.51
  4. Step 4: Simplify right side
    1,909.90x = 3,286,298.96
  5. Step 5: Solve for x
    x = 3,286,298.96/1,909.90
  6. Step 6: Final answer
    x = 1,720.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.