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Finding the Fourth Proportional to 1,643.65, 2,268.15 and 897.64

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Solution

The fourth proportional to 1,643.65, 2,268.15 and 897.64 is: 1,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.65 : 2,268.15 = 897.64 : x
  2. Step 2: Convert to fraction form
    1,643.65/2,268.15 = 897.64/x
  3. Step 3: Cross multiply
    1,643.65x = 2,268.15 × 897.64
  4. Step 4: Simplify right side
    1,643.65x = 2,035,982.17
  5. Step 5: Solve for x
    x = 2,035,982.17/1,643.65
  6. Step 6: Final answer
    x = 1,238.70

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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.