Home / 1,915.65-2,643.84-1,076.40

Finding the Fourth Proportional to 1,915.65, 2,643.84 and 1,076.40

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Solution

The fourth proportional to 1,915.65, 2,643.84 and 1,076.40 is: 1,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.65 : 2,643.84 = 1,076.40 : x
  2. Step 2: Convert to fraction form
    1,915.65/2,643.84 = 1,076.40/x
  3. Step 3: Cross multiply
    1,915.65x = 2,643.84 × 1,076.40
  4. Step 4: Simplify right side
    1,915.65x = 2,845,829.38
  5. Step 5: Solve for x
    x = 2,845,829.38/1,915.65
  6. Step 6: Final answer
    x = 1,485.57

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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.