Home / 5,190.15-7,783.80-1,491.39

Finding the Fourth Proportional to 5,190.15, 7,783.80 and 1,491.39

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Solution

The fourth proportional to 5,190.15, 7,783.80 and 1,491.39 is: 2,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.15 : 7,783.80 = 1,491.39 : x
  2. Step 2: Convert to fraction form
    5,190.15/7,783.80 = 1,491.39/x
  3. Step 3: Cross multiply
    5,190.15x = 7,783.80 × 1,491.39
  4. Step 4: Simplify right side
    5,190.15x = 11,608,681.48
  5. Step 5: Solve for x
    x = 11,608,681.48/5,190.15
  6. Step 6: Final answer
    x = 2,236.68

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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.