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Finding the Fourth Proportional to 2,801.78, 4,200.38 and 1,485.47

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Solution

The fourth proportional to 2,801.78, 4,200.38 and 1,485.47 is: 2,226.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,801.78 : 4,200.38 = 1,485.47 : x
  2. Step 2: Convert to fraction form
    2,801.78/4,200.38 = 1,485.47/x
  3. Step 3: Cross multiply
    2,801.78x = 4,200.38 × 1,485.47
  4. Step 4: Simplify right side
    2,801.78x = 6,239,510.05
  5. Step 5: Solve for x
    x = 6,239,510.05/2,801.78
  6. Step 6: Final answer
    x = 2,226.98

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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.