Home / 4,748.28-7,122.78-1,285.48

Finding the Fourth Proportional to 4,748.28, 7,122.78 and 1,285.48

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Solution

The fourth proportional to 4,748.28, 7,122.78 and 1,285.48 is: 1,928.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,748.28 : 7,122.78 = 1,285.48 : x
  2. Step 2: Convert to fraction form
    4,748.28/7,122.78 = 1,285.48/x
  3. Step 3: Cross multiply
    4,748.28x = 7,122.78 × 1,285.48
  4. Step 4: Simplify right side
    4,748.28x = 9,156,191.23
  5. Step 5: Solve for x
    x = 9,156,191.23/4,748.28
  6. Step 6: Final answer
    x = 1,928.32

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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.