Home / 2,486.76-3,431.88-1,438.92

Finding the Fourth Proportional to 2,486.76, 3,431.88 and 1,438.92

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Solution

The fourth proportional to 2,486.76, 3,431.88 and 1,438.92 is: 1,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.76 : 3,431.88 = 1,438.92 : x
  2. Step 2: Convert to fraction form
    2,486.76/3,431.88 = 1,438.92/x
  3. Step 3: Cross multiply
    2,486.76x = 3,431.88 × 1,438.92
  4. Step 4: Simplify right side
    2,486.76x = 4,938,200.77
  5. Step 5: Solve for x
    x = 4,938,200.77/2,486.76
  6. Step 6: Final answer
    x = 1,985.80

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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.