Home / 1,416.95-2,121.77-979.55

Finding the Fourth Proportional to 1,416.95, 2,121.77 and 979.55

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Solution

The fourth proportional to 1,416.95, 2,121.77 and 979.55 is: 1,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.95 : 2,121.77 = 979.55 : x
  2. Step 2: Convert to fraction form
    1,416.95/2,121.77 = 979.55/x
  3. Step 3: Cross multiply
    1,416.95x = 2,121.77 × 979.55
  4. Step 4: Simplify right side
    1,416.95x = 2,078,387.56
  5. Step 5: Solve for x
    x = 2,078,387.56/1,416.95
  6. Step 6: Final answer
    x = 1,466.80

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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.