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Finding the Fourth Proportional to 2,798.55, 3,862.35 and 1,806.72

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Solution

The fourth proportional to 2,798.55, 3,862.35 and 1,806.72 is: 2,493.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.55 : 3,862.35 = 1,806.72 : x
  2. Step 2: Convert to fraction form
    2,798.55/3,862.35 = 1,806.72/x
  3. Step 3: Cross multiply
    2,798.55x = 3,862.35 × 1,806.72
  4. Step 4: Simplify right side
    2,798.55x = 6,978,184.99
  5. Step 5: Solve for x
    x = 6,978,184.99/2,798.55
  6. Step 6: Final answer
    x = 2,493.50

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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.