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Finding the Fourth Proportional to 1,197.00, 1,649.99 and 986.84

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Solution

The fourth proportional to 1,197.00, 1,649.99 and 986.84 is: 1,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.00 : 1,649.99 = 986.84 : x
  2. Step 2: Convert to fraction form
    1,197.00/1,649.99 = 986.84/x
  3. Step 3: Cross multiply
    1,197.00x = 1,649.99 × 986.84
  4. Step 4: Simplify right side
    1,197.00x = 1,628,276.84
  5. Step 5: Solve for x
    x = 1,628,276.84/1,197.00
  6. Step 6: Final answer
    x = 1,360.30

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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.