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Finding the Fourth Proportional to 5,285.64, 7,928.48 and 1,999.76

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Solution

The fourth proportional to 5,285.64, 7,928.48 and 1,999.76 is: 2,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.64 : 7,928.48 = 1,999.76 : x
  2. Step 2: Convert to fraction form
    5,285.64/7,928.48 = 1,999.76/x
  3. Step 3: Cross multiply
    5,285.64x = 7,928.48 × 1,999.76
  4. Step 4: Simplify right side
    5,285.64x = 15,855,057.16
  5. Step 5: Solve for x
    x = 15,855,057.16/5,285.64
  6. Step 6: Final answer
    x = 2,999.65

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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.