Home / 2,928.20-4,391.23-847.51

Finding the Fourth Proportional to 2,928.20, 4,391.23 and 847.51

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Solution

The fourth proportional to 2,928.20, 4,391.23 and 847.51 is: 1,270.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.20 : 4,391.23 = 847.51 : x
  2. Step 2: Convert to fraction form
    2,928.20/4,391.23 = 847.51/x
  3. Step 3: Cross multiply
    2,928.20x = 4,391.23 × 847.51
  4. Step 4: Simplify right side
    2,928.20x = 3,721,611.34
  5. Step 5: Solve for x
    x = 3,721,611.34/2,928.20
  6. Step 6: Final answer
    x = 1,270.96

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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.