Home / 1,915.90-2,643.59-1,170.05

Finding the Fourth Proportional to 1,915.90, 2,643.59 and 1,170.05

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Solution

The fourth proportional to 1,915.90, 2,643.59 and 1,170.05 is: 1,614.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.90 : 2,643.59 = 1,170.05 : x
  2. Step 2: Convert to fraction form
    1,915.90/2,643.59 = 1,170.05/x
  3. Step 3: Cross multiply
    1,915.90x = 2,643.59 × 1,170.05
  4. Step 4: Simplify right side
    1,915.90x = 3,093,115.61
  5. Step 5: Solve for x
    x = 3,093,115.61/1,915.90
  6. Step 6: Final answer
    x = 1,614.44

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.