Home / 4,947.78-7,421.61-1,485

Finding the Fourth Proportional to 4,947.78, 7,421.61 and 1,485

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Solution

The fourth proportional to 4,947.78, 7,421.61 and 1,485 is: 2,227.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.78 : 7,421.61 = 1,485 : x
  2. Step 2: Convert to fraction form
    4,947.78/7,421.61 = 1,485/x
  3. Step 3: Cross multiply
    4,947.78x = 7,421.61 × 1,485
  4. Step 4: Simplify right side
    4,947.78x = 11,021,090.85
  5. Step 5: Solve for x
    x = 11,021,090.85/4,947.78
  6. Step 6: Final answer
    x = 2,227.48

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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.