Home / 1,528.44-2,107.80-938.76

Finding the Fourth Proportional to 1,528.44, 2,107.80 and 938.76

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Solution

The fourth proportional to 1,528.44, 2,107.80 and 938.76 is: 1,294.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.44 : 2,107.80 = 938.76 : x
  2. Step 2: Convert to fraction form
    1,528.44/2,107.80 = 938.76/x
  3. Step 3: Cross multiply
    1,528.44x = 2,107.80 × 938.76
  4. Step 4: Simplify right side
    1,528.44x = 1,978,718.33
  5. Step 5: Solve for x
    x = 1,978,718.33/1,528.44
  6. Step 6: Final answer
    x = 1,294.60

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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.