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Finding the Fourth Proportional to 1,192.37, 1,643.40 and 897.12

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Solution

The fourth proportional to 1,192.37, 1,643.40 and 897.12 is: 1,236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.37 : 1,643.40 = 897.12 : x
  2. Step 2: Convert to fraction form
    1,192.37/1,643.40 = 897.12/x
  3. Step 3: Cross multiply
    1,192.37x = 1,643.40 × 897.12
  4. Step 4: Simplify right side
    1,192.37x = 1,474,327.01
  5. Step 5: Solve for x
    x = 1,474,327.01/1,192.37
  6. Step 6: Final answer
    x = 1,236.47

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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.