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Finding the Fourth Proportional to 1,928.40, 2,892.60 and 696.21

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Solution

The fourth proportional to 1,928.40, 2,892.60 and 696.21 is: 1,044.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.40 : 2,892.60 = 696.21 : x
  2. Step 2: Convert to fraction form
    1,928.40/2,892.60 = 696.21/x
  3. Step 3: Cross multiply
    1,928.40x = 2,892.60 × 696.21
  4. Step 4: Simplify right side
    1,928.40x = 2,013,857.05
  5. Step 5: Solve for x
    x = 2,013,857.05/1,928.40
  6. Step 6: Final answer
    x = 1,044.32

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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.