Home / 2,938.16-4,405.80-1,639.28

Finding the Fourth Proportional to 2,938.16, 4,405.80 and 1,639.28

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Solution

The fourth proportional to 2,938.16, 4,405.80 and 1,639.28 is: 2,458.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.16 : 4,405.80 = 1,639.28 : x
  2. Step 2: Convert to fraction form
    2,938.16/4,405.80 = 1,639.28/x
  3. Step 3: Cross multiply
    2,938.16x = 4,405.80 × 1,639.28
  4. Step 4: Simplify right side
    2,938.16x = 7,222,339.82
  5. Step 5: Solve for x
    x = 7,222,339.82/2,938.16
  6. Step 6: Final answer
    x = 2,458.12

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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.