Home / 2,486.77-3,431.35-1,438.63

Finding the Fourth Proportional to 2,486.77, 3,431.35 and 1,438.63

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Solution

The fourth proportional to 2,486.77, 3,431.35 and 1,438.63 is: 1,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.77 : 3,431.35 = 1,438.63 : x
  2. Step 2: Convert to fraction form
    2,486.77/3,431.35 = 1,438.63/x
  3. Step 3: Cross multiply
    2,486.77x = 3,431.35 × 1,438.63
  4. Step 4: Simplify right side
    2,486.77x = 4,936,443.05
  5. Step 5: Solve for x
    x = 4,936,443.05/2,486.77
  6. Step 6: Final answer
    x = 1,985.08

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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.