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Finding the Fourth Proportional to 4,765.84, 7,149.90 and 1,990.98

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Solution

The fourth proportional to 4,765.84, 7,149.90 and 1,990.98 is: 2,986.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,765.84 : 7,149.90 = 1,990.98 : x
  2. Step 2: Convert to fraction form
    4,765.84/7,149.90 = 1,990.98/x
  3. Step 3: Cross multiply
    4,765.84x = 7,149.90 × 1,990.98
  4. Step 4: Simplify right side
    4,765.84x = 14,235,307.90
  5. Step 5: Solve for x
    x = 14,235,307.90/4,765.84
  6. Step 6: Final answer
    x = 2,986.95

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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.