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Finding the Fourth Proportional to 2,803.51, 3,867.54 and 1,809.11

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Solution

The fourth proportional to 2,803.51, 3,867.54 and 1,809.11 is: 2,495.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.51 : 3,867.54 = 1,809.11 : x
  2. Step 2: Convert to fraction form
    2,803.51/3,867.54 = 1,809.11/x
  3. Step 3: Cross multiply
    2,803.51x = 3,867.54 × 1,809.11
  4. Step 4: Simplify right side
    2,803.51x = 6,996,785.95
  5. Step 5: Solve for x
    x = 6,996,785.95/2,803.51
  6. Step 6: Final answer
    x = 2,495.72

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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.