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Finding the Fourth Proportional to 2,742.96, 4,114.40 and 690.96

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Solution

The fourth proportional to 2,742.96, 4,114.40 and 690.96 is: 1,036.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,742.96 : 4,114.40 = 690.96 : x
  2. Step 2: Convert to fraction form
    2,742.96/4,114.40 = 690.96/x
  3. Step 3: Cross multiply
    2,742.96x = 4,114.40 × 690.96
  4. Step 4: Simplify right side
    2,742.96x = 2,842,885.82
  5. Step 5: Solve for x
    x = 2,842,885.82/2,742.96
  6. Step 6: Final answer
    x = 1,036.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.