Home / 1,636.90-2,454.60-979.06

Finding the Fourth Proportional to 1,636.90, 2,454.60 and 979.06

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Solution

The fourth proportional to 1,636.90, 2,454.60 and 979.06 is: 1,468.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.90 : 2,454.60 = 979.06 : x
  2. Step 2: Convert to fraction form
    1,636.90/2,454.60 = 979.06/x
  3. Step 3: Cross multiply
    1,636.90x = 2,454.60 × 979.06
  4. Step 4: Simplify right side
    1,636.90x = 2,403,200.68
  5. Step 5: Solve for x
    x = 2,403,200.68/1,636.90
  6. Step 6: Final answer
    x = 1,468.14

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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.