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Finding the Fourth Proportional to 4,920.40, 7,373.40 and 1,993.60

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Solution

The fourth proportional to 4,920.40, 7,373.40 and 1,993.60 is: 2,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.40 : 7,373.40 = 1,993.60 : x
  2. Step 2: Convert to fraction form
    4,920.40/7,373.40 = 1,993.60/x
  3. Step 3: Cross multiply
    4,920.40x = 7,373.40 × 1,993.60
  4. Step 4: Simplify right side
    4,920.40x = 14,699,610.24
  5. Step 5: Solve for x
    x = 14,699,610.24/4,920.40
  6. Step 6: Final answer
    x = 2,987.48

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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.