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Finding the Fourth Proportional to 3,988.77, 5,980.65 and 2,894.05

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Solution

The fourth proportional to 3,988.77, 5,980.65 and 2,894.05 is: 4,339.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.77 : 5,980.65 = 2,894.05 : x
  2. Step 2: Convert to fraction form
    3,988.77/5,980.65 = 2,894.05/x
  3. Step 3: Cross multiply
    3,988.77x = 5,980.65 × 2,894.05
  4. Step 4: Simplify right side
    3,988.77x = 17,308,300.13
  5. Step 5: Solve for x
    x = 17,308,300.13/3,988.77
  6. Step 6: Final answer
    x = 4,339.26

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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.