Home / 1,528.92-2,110.20-939.96

Finding the Fourth Proportional to 1,528.92, 2,110.20 and 939.96

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Solution

The fourth proportional to 1,528.92, 2,110.20 and 939.96 is: 1,297.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.92 : 2,110.20 = 939.96 : x
  2. Step 2: Convert to fraction form
    1,528.92/2,110.20 = 939.96/x
  3. Step 3: Cross multiply
    1,528.92x = 2,110.20 × 939.96
  4. Step 4: Simplify right side
    1,528.92x = 1,983,503.59
  5. Step 5: Solve for x
    x = 1,983,503.59/1,528.92
  6. Step 6: Final answer
    x = 1,297.32

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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.