Home / 3,909.63-5,865.33-1,312.50

Finding the Fourth Proportional to 3,909.63, 5,865.33 and 1,312.50

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Solution

The fourth proportional to 3,909.63, 5,865.33 and 1,312.50 is: 1,969.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.63 : 5,865.33 = 1,312.50 : x
  2. Step 2: Convert to fraction form
    3,909.63/5,865.33 = 1,312.50/x
  3. Step 3: Cross multiply
    3,909.63x = 5,865.33 × 1,312.50
  4. Step 4: Simplify right side
    3,909.63x = 7,698,245.63
  5. Step 5: Solve for x
    x = 7,698,245.63/3,909.63
  6. Step 6: Final answer
    x = 1,969.05

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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.