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Finding the Fourth Proportional to 2,985.73, 4,480.80 and 1,425.73

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Solution

The fourth proportional to 2,985.73, 4,480.80 and 1,425.73 is: 2,139.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.73 : 4,480.80 = 1,425.73 : x
  2. Step 2: Convert to fraction form
    2,985.73/4,480.80 = 1,425.73/x
  3. Step 3: Cross multiply
    2,985.73x = 4,480.80 × 1,425.73
  4. Step 4: Simplify right side
    2,985.73x = 6,388,410.98
  5. Step 5: Solve for x
    x = 6,388,410.98/2,985.73
  6. Step 6: Final answer
    x = 2,139.65

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1.5x scale

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.