Home / 1,636.84-2,455.80-1,290.34

Finding the Fourth Proportional to 1,636.84, 2,455.80 and 1,290.34

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Solution

The fourth proportional to 1,636.84, 2,455.80 and 1,290.34 is: 1,935.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.84 : 2,455.80 = 1,290.34 : x
  2. Step 2: Convert to fraction form
    1,636.84/2,455.80 = 1,290.34/x
  3. Step 3: Cross multiply
    1,636.84x = 2,455.80 × 1,290.34
  4. Step 4: Simplify right side
    1,636.84x = 3,168,816.97
  5. Step 5: Solve for x
    x = 3,168,816.97/1,636.84
  6. Step 6: Final answer
    x = 1,935.94

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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.