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Finding the Fourth Proportional to 1,861.57, 2,803.14 and 1,345.08

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Solution

The fourth proportional to 1,861.57, 2,803.14 and 1,345.08 is: 2,025.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.57 : 2,803.14 = 1,345.08 : x
  2. Step 2: Convert to fraction form
    1,861.57/2,803.14 = 1,345.08/x
  3. Step 3: Cross multiply
    1,861.57x = 2,803.14 × 1,345.08
  4. Step 4: Simplify right side
    1,861.57x = 3,770,447.55
  5. Step 5: Solve for x
    x = 3,770,447.55/1,861.57
  6. Step 6: Final answer
    x = 2,025.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.