Home / 1,408.08-1,938.72-1,197.84

Finding the Fourth Proportional to 1,408.08, 1,938.72 and 1,197.84

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Solution

The fourth proportional to 1,408.08, 1,938.72 and 1,197.84 is: 1,649.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.08 : 1,938.72 = 1,197.84 : x
  2. Step 2: Convert to fraction form
    1,408.08/1,938.72 = 1,197.84/x
  3. Step 3: Cross multiply
    1,408.08x = 1,938.72 × 1,197.84
  4. Step 4: Simplify right side
    1,408.08x = 2,322,276.36
  5. Step 5: Solve for x
    x = 2,322,276.36/1,408.08
  6. Step 6: Final answer
    x = 1,649.25

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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.