Home / 1,527.12-2,107.42-828.49

Finding the Fourth Proportional to 1,527.12, 2,107.42 and 828.49

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Solution

The fourth proportional to 1,527.12, 2,107.42 and 828.49 is: 1,143.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.12 : 2,107.42 = 828.49 : x
  2. Step 2: Convert to fraction form
    1,527.12/2,107.42 = 828.49/x
  3. Step 3: Cross multiply
    1,527.12x = 2,107.42 × 828.49
  4. Step 4: Simplify right side
    1,527.12x = 1,745,982.43
  5. Step 5: Solve for x
    x = 1,745,982.43/1,527.12
  6. Step 6: Final answer
    x = 1,143.32

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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.