Home / 2,108.03-2,905.20-1,689.76

Finding the Fourth Proportional to 2,108.03, 2,905.20 and 1,689.76

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Solution

The fourth proportional to 2,108.03, 2,905.20 and 1,689.76 is: 2,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.03 : 2,905.20 = 1,689.76 : x
  2. Step 2: Convert to fraction form
    2,108.03/2,905.20 = 1,689.76/x
  3. Step 3: Cross multiply
    2,108.03x = 2,905.20 × 1,689.76
  4. Step 4: Simplify right side
    2,108.03x = 4,909,082.30
  5. Step 5: Solve for x
    x = 4,909,082.30/2,108.03
  6. Step 6: Final answer
    x = 2,328.76

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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.