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Finding the Fourth Proportional to 3,185.16, 4,777.77 and 993.90

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Solution

The fourth proportional to 3,185.16, 4,777.77 and 993.90 is: 1,490.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.16 : 4,777.77 = 993.90 : x
  2. Step 2: Convert to fraction form
    3,185.16/4,777.77 = 993.90/x
  3. Step 3: Cross multiply
    3,185.16x = 4,777.77 × 993.90
  4. Step 4: Simplify right side
    3,185.16x = 4,748,625.60
  5. Step 5: Solve for x
    x = 4,748,625.60/3,185.16
  6. Step 6: Final answer
    x = 1,490.86

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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.