Home / 2,486.89-3,431.53-1,438.75

Finding the Fourth Proportional to 2,486.89, 3,431.53 and 1,438.75

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Solution

The fourth proportional to 2,486.89, 3,431.53 and 1,438.75 is: 1,985.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.89 : 3,431.53 = 1,438.75 : x
  2. Step 2: Convert to fraction form
    2,486.89/3,431.53 = 1,438.75/x
  3. Step 3: Cross multiply
    2,486.89x = 3,431.53 × 1,438.75
  4. Step 4: Simplify right side
    2,486.89x = 4,937,113.79
  5. Step 5: Solve for x
    x = 4,937,113.79/2,486.89
  6. Step 6: Final answer
    x = 1,985.26

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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.