Home / 3,156.05-4,355.37-1,811.30

Finding the Fourth Proportional to 3,156.05, 4,355.37 and 1,811.30

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Solution

The fourth proportional to 3,156.05, 4,355.37 and 1,811.30 is: 2,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.05 : 4,355.37 = 1,811.30 : x
  2. Step 2: Convert to fraction form
    3,156.05/4,355.37 = 1,811.30/x
  3. Step 3: Cross multiply
    3,156.05x = 4,355.37 × 1,811.30
  4. Step 4: Simplify right side
    3,156.05x = 7,888,881.68
  5. Step 5: Solve for x
    x = 7,888,881.68/3,156.05
  6. Step 6: Final answer
    x = 2,499.60

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1.5x scale

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.