Home / 1,528.11-2,108.84-938.84

Finding the Fourth Proportional to 1,528.11, 2,108.84 and 938.84

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Solution

The fourth proportional to 1,528.11, 2,108.84 and 938.84 is: 1,295.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.11 : 2,108.84 = 938.84 : x
  2. Step 2: Convert to fraction form
    1,528.11/2,108.84 = 938.84/x
  3. Step 3: Cross multiply
    1,528.11x = 2,108.84 × 938.84
  4. Step 4: Simplify right side
    1,528.11x = 1,979,848.11
  5. Step 5: Solve for x
    x = 1,979,848.11/1,528.11
  6. Step 6: Final answer
    x = 1,295.62

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Half scale
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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.