Home / 2,638.12-3,640.48-1,459.20

Finding the Fourth Proportional to 2,638.12, 3,640.48 and 1,459.20

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Solution

The fourth proportional to 2,638.12, 3,640.48 and 1,459.20 is: 2,013.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.12 : 3,640.48 = 1,459.20 : x
  2. Step 2: Convert to fraction form
    2,638.12/3,640.48 = 1,459.20/x
  3. Step 3: Cross multiply
    2,638.12x = 3,640.48 × 1,459.20
  4. Step 4: Simplify right side
    2,638.12x = 5,312,188.42
  5. Step 5: Solve for x
    x = 5,312,188.42/2,638.12
  6. Step 6: Final answer
    x = 2,013.63

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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.