Home / 2,918.40-4,382.40-1,948.80

Finding the Fourth Proportional to 2,918.40, 4,382.40 and 1,948.80

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Solution

The fourth proportional to 2,918.40, 4,382.40 and 1,948.80 is: 2,926.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.40 : 4,382.40 = 1,948.80 : x
  2. Step 2: Convert to fraction form
    2,918.40/4,382.40 = 1,948.80/x
  3. Step 3: Cross multiply
    2,918.40x = 4,382.40 × 1,948.80
  4. Step 4: Simplify right side
    2,918.40x = 8,540,421.12
  5. Step 5: Solve for x
    x = 8,540,421.12/2,918.40
  6. Step 6: Final answer
    x = 2,926.41

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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.