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Finding the Fourth Proportional to 4,885.79, 6,742.38 and 2,647.67

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Solution

The fourth proportional to 4,885.79, 6,742.38 and 2,647.67 is: 3,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,885.79 : 6,742.38 = 2,647.67 : x
  2. Step 2: Convert to fraction form
    4,885.79/6,742.38 = 2,647.67/x
  3. Step 3: Cross multiply
    4,885.79x = 6,742.38 × 2,647.67
  4. Step 4: Simplify right side
    4,885.79x = 17,851,597.25
  5. Step 5: Solve for x
    x = 17,851,597.25/4,885.79
  6. Step 6: Final answer
    x = 3,653.78

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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.