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Finding the Fourth Proportional to 2,986.63, 4,121.63 and 1,807.01

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Solution

The fourth proportional to 2,986.63, 4,121.63 and 1,807.01 is: 2,493.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.63 : 4,121.63 = 1,807.01 : x
  2. Step 2: Convert to fraction form
    2,986.63/4,121.63 = 1,807.01/x
  3. Step 3: Cross multiply
    2,986.63x = 4,121.63 × 1,807.01
  4. Step 4: Simplify right side
    2,986.63x = 7,447,826.63
  5. Step 5: Solve for x
    x = 7,447,826.63/2,986.63
  6. Step 6: Final answer
    x = 2,493.72

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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.