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Finding the Fourth Proportional to 2,890.84, 3,988.45 and 1,771.22

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Solution

The fourth proportional to 2,890.84, 3,988.45 and 1,771.22 is: 2,443.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.84 : 3,988.45 = 1,771.22 : x
  2. Step 2: Convert to fraction form
    2,890.84/3,988.45 = 1,771.22/x
  3. Step 3: Cross multiply
    2,890.84x = 3,988.45 × 1,771.22
  4. Step 4: Simplify right side
    2,890.84x = 7,064,422.41
  5. Step 5: Solve for x
    x = 7,064,422.41/2,890.84
  6. Step 6: Final answer
    x = 2,443.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.