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Finding the Fourth Proportional to 3,155.93, 4,355.00 and 1,811.23

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Solution

The fourth proportional to 3,155.93, 4,355.00 and 1,811.23 is: 2,499.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.93 : 4,355.00 = 1,811.23 : x
  2. Step 2: Convert to fraction form
    3,155.93/4,355.00 = 1,811.23/x
  3. Step 3: Cross multiply
    3,155.93x = 4,355.00 × 1,811.23
  4. Step 4: Simplify right side
    3,155.93x = 7,887,919.51
  5. Step 5: Solve for x
    x = 7,887,919.51/3,155.93
  6. Step 6: Final answer
    x = 2,499.39

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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.