Home / 1,512.21-2,268.81-742.17

Finding the Fourth Proportional to 1,512.21, 2,268.81 and 742.17

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Solution

The fourth proportional to 1,512.21, 2,268.81 and 742.17 is: 1,113.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.21 : 2,268.81 = 742.17 : x
  2. Step 2: Convert to fraction form
    1,512.21/2,268.81 = 742.17/x
  3. Step 3: Cross multiply
    1,512.21x = 2,268.81 × 742.17
  4. Step 4: Simplify right side
    1,512.21x = 1,683,842.72
  5. Step 5: Solve for x
    x = 1,683,842.72/1,512.21
  6. Step 6: Final answer
    x = 1,113.50

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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.