Home / 1,638.15-2,261.94-1,008.99

Finding the Fourth Proportional to 1,638.15, 2,261.94 and 1,008.99

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Solution

The fourth proportional to 1,638.15, 2,261.94 and 1,008.99 is: 1,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.15 : 2,261.94 = 1,008.99 : x
  2. Step 2: Convert to fraction form
    1,638.15/2,261.94 = 1,008.99/x
  3. Step 3: Cross multiply
    1,638.15x = 2,261.94 × 1,008.99
  4. Step 4: Simplify right side
    1,638.15x = 2,282,274.84
  5. Step 5: Solve for x
    x = 2,282,274.84/1,638.15
  6. Step 6: Final answer
    x = 1,393.20

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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.