Home / 5,285.37-7,928.52-1,389.75

Finding the Fourth Proportional to 5,285.37, 7,928.52 and 1,389.75

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Solution

The fourth proportional to 5,285.37, 7,928.52 and 1,389.75 is: 2,084.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.37 : 7,928.52 = 1,389.75 : x
  2. Step 2: Convert to fraction form
    5,285.37/7,928.52 = 1,389.75/x
  3. Step 3: Cross multiply
    5,285.37x = 7,928.52 × 1,389.75
  4. Step 4: Simplify right side
    5,285.37x = 11,018,660.67
  5. Step 5: Solve for x
    x = 11,018,660.67/5,285.37
  6. Step 6: Final answer
    x = 2,084.75

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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.