Home / 2,890.88-3,988-1,771.46

Finding the Fourth Proportional to 2,890.88, 3,988 and 1,771.46

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Solution

The fourth proportional to 2,890.88, 3,988 and 1,771.46 is: 2,443.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.88 : 3,988 = 1,771.46 : x
  2. Step 2: Convert to fraction form
    2,890.88/3,988 = 1,771.46/x
  3. Step 3: Cross multiply
    2,890.88x = 3,988 × 1,771.46
  4. Step 4: Simplify right side
    2,890.88x = 7,064,582.48
  5. Step 5: Solve for x
    x = 7,064,582.48/2,890.88
  6. Step 6: Final answer
    x = 2,443.75

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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.