Home / 2,915.80-4,020.06-1,919.50

Finding the Fourth Proportional to 2,915.80, 4,020.06 and 1,919.50

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Solution

The fourth proportional to 2,915.80, 4,020.06 and 1,919.50 is: 2,646.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.80 : 4,020.06 = 1,919.50 : x
  2. Step 2: Convert to fraction form
    2,915.80/4,020.06 = 1,919.50/x
  3. Step 3: Cross multiply
    2,915.80x = 4,020.06 × 1,919.50
  4. Step 4: Simplify right side
    2,915.80x = 7,716,505.17
  5. Step 5: Solve for x
    x = 7,716,505.17/2,915.80
  6. Step 6: Final answer
    x = 2,646.45

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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.