Home / 2,915.12-4,372.83-1,271.78

Finding the Fourth Proportional to 2,915.12, 4,372.83 and 1,271.78

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Solution

The fourth proportional to 2,915.12, 4,372.83 and 1,271.78 is: 1,907.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.12 : 4,372.83 = 1,271.78 : x
  2. Step 2: Convert to fraction form
    2,915.12/4,372.83 = 1,271.78/x
  3. Step 3: Cross multiply
    2,915.12x = 4,372.83 × 1,271.78
  4. Step 4: Simplify right side
    2,915.12x = 5,561,277.74
  5. Step 5: Solve for x
    x = 5,561,277.74/2,915.12
  6. Step 6: Final answer
    x = 1,907.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.