Home / 2,808.10-3,875.50-1,689.60

Finding the Fourth Proportional to 2,808.10, 3,875.50 and 1,689.60

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Solution

The fourth proportional to 2,808.10, 3,875.50 and 1,689.60 is: 2,331.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.10 : 3,875.50 = 1,689.60 : x
  2. Step 2: Convert to fraction form
    2,808.10/3,875.50 = 1,689.60/x
  3. Step 3: Cross multiply
    2,808.10x = 3,875.50 × 1,689.60
  4. Step 4: Simplify right side
    2,808.10x = 6,548,044.80
  5. Step 5: Solve for x
    x = 6,548,044.80/2,808.10
  6. Step 6: Final answer
    x = 2,331.84

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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.