Home / 1,988.12-2,977.30-1,639.32

Finding the Fourth Proportional to 1,988.12, 2,977.30 and 1,639.32

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Solution

The fourth proportional to 1,988.12, 2,977.30 and 1,639.32 is: 2,454.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.12 : 2,977.30 = 1,639.32 : x
  2. Step 2: Convert to fraction form
    1,988.12/2,977.30 = 1,639.32/x
  3. Step 3: Cross multiply
    1,988.12x = 2,977.30 × 1,639.32
  4. Step 4: Simplify right side
    1,988.12x = 4,880,747.44
  5. Step 5: Solve for x
    x = 4,880,747.44/1,988.12
  6. Step 6: Final answer
    x = 2,454.96

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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.