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Finding the Fourth Proportional to 3,865.38, 5,798.08 and 1,643.64

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Solution

The fourth proportional to 3,865.38, 5,798.08 and 1,643.64 is: 2,465.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.38 : 5,798.08 = 1,643.64 : x
  2. Step 2: Convert to fraction form
    3,865.38/5,798.08 = 1,643.64/x
  3. Step 3: Cross multiply
    3,865.38x = 5,798.08 × 1,643.64
  4. Step 4: Simplify right side
    3,865.38x = 9,529,923.11
  5. Step 5: Solve for x
    x = 9,529,923.11/3,865.38
  6. Step 6: Final answer
    x = 2,465.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.