Home / 5,286.02-7,928.40-1,390.73

Finding the Fourth Proportional to 5,286.02, 7,928.40 and 1,390.73

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Solution

The fourth proportional to 5,286.02, 7,928.40 and 1,390.73 is: 2,085.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.02 : 7,928.40 = 1,390.73 : x
  2. Step 2: Convert to fraction form
    5,286.02/7,928.40 = 1,390.73/x
  3. Step 3: Cross multiply
    5,286.02x = 7,928.40 × 1,390.73
  4. Step 4: Simplify right side
    5,286.02x = 11,026,283.55
  5. Step 5: Solve for x
    x = 11,026,283.55/5,286.02
  6. Step 6: Final answer
    x = 2,085.93

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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.