Home / 1,638.30-2,457.45-1,616.70

Finding the Fourth Proportional to 1,638.30, 2,457.45 and 1,616.70

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Solution

The fourth proportional to 1,638.30, 2,457.45 and 1,616.70 is: 2,425.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.30 : 2,457.45 = 1,616.70 : x
  2. Step 2: Convert to fraction form
    1,638.30/2,457.45 = 1,616.70/x
  3. Step 3: Cross multiply
    1,638.30x = 2,457.45 × 1,616.70
  4. Step 4: Simplify right side
    1,638.30x = 3,972,959.42
  5. Step 5: Solve for x
    x = 3,972,959.42/1,638.30
  6. Step 6: Final answer
    x = 2,425.05

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1.5x scale

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.