Home / 5,285.68-7,928.58-1,390.48

Finding the Fourth Proportional to 5,285.68, 7,928.58 and 1,390.48

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Solution

The fourth proportional to 5,285.68, 7,928.58 and 1,390.48 is: 2,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.68 : 7,928.58 = 1,390.48 : x
  2. Step 2: Convert to fraction form
    5,285.68/7,928.58 = 1,390.48/x
  3. Step 3: Cross multiply
    5,285.68x = 7,928.58 × 1,390.48
  4. Step 4: Simplify right side
    5,285.68x = 11,024,531.92
  5. Step 5: Solve for x
    x = 11,024,531.92/5,285.68
  6. Step 6: Final answer
    x = 2,085.74

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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.