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Finding the Fourth Proportional to 3,645.56, 5,030.88 and 1,989.56

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Solution

The fourth proportional to 3,645.56, 5,030.88 and 1,989.56 is: 2,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,645.56 : 5,030.88 = 1,989.56 : x
  2. Step 2: Convert to fraction form
    3,645.56/5,030.88 = 1,989.56/x
  3. Step 3: Cross multiply
    3,645.56x = 5,030.88 × 1,989.56
  4. Step 4: Simplify right side
    3,645.56x = 10,009,237.61
  5. Step 5: Solve for x
    x = 10,009,237.61/3,645.56
  6. Step 6: Final answer
    x = 2,745.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.