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Finding the Fourth Proportional to 5,878.22, 8,811.80 and 1,979.90

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Solution

The fourth proportional to 5,878.22, 8,811.80 and 1,979.90 is: 2,967.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,878.22 : 8,811.80 = 1,979.90 : x
  2. Step 2: Convert to fraction form
    5,878.22/8,811.80 = 1,979.90/x
  3. Step 3: Cross multiply
    5,878.22x = 8,811.80 × 1,979.90
  4. Step 4: Simplify right side
    5,878.22x = 17,446,482.82
  5. Step 5: Solve for x
    x = 17,446,482.82/5,878.22
  6. Step 6: Final answer
    x = 2,967.99

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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.