Home / 1,915.14-2,643.08-1,286.98

Finding the Fourth Proportional to 1,915.14, 2,643.08 and 1,286.98

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Solution

The fourth proportional to 1,915.14, 2,643.08 and 1,286.98 is: 1,776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.14 : 2,643.08 = 1,286.98 : x
  2. Step 2: Convert to fraction form
    1,915.14/2,643.08 = 1,286.98/x
  3. Step 3: Cross multiply
    1,915.14x = 2,643.08 × 1,286.98
  4. Step 4: Simplify right side
    1,915.14x = 3,401,582.86
  5. Step 5: Solve for x
    x = 3,401,582.86/1,915.14
  6. Step 6: Final answer
    x = 1,776.15

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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.