Home / 3,856.11-5,783.15-1,390.47

Finding the Fourth Proportional to 3,856.11, 5,783.15 and 1,390.47

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Solution

The fourth proportional to 3,856.11, 5,783.15 and 1,390.47 is: 2,085.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.11 : 5,783.15 = 1,390.47 : x
  2. Step 2: Convert to fraction form
    3,856.11/5,783.15 = 1,390.47/x
  3. Step 3: Cross multiply
    3,856.11x = 5,783.15 × 1,390.47
  4. Step 4: Simplify right side
    3,856.11x = 8,041,300.06
  5. Step 5: Solve for x
    x = 8,041,300.06/3,856.11
  6. Step 6: Final answer
    x = 2,085.34

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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.