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Finding the Fourth Proportional to 3,325.98, 4,989.88 and 986.10

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Solution

The fourth proportional to 3,325.98, 4,989.88 and 986.10 is: 1,479.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,325.98 : 4,989.88 = 986.10 : x
  2. Step 2: Convert to fraction form
    3,325.98/4,989.88 = 986.10/x
  3. Step 3: Cross multiply
    3,325.98x = 4,989.88 × 986.10
  4. Step 4: Simplify right side
    3,325.98x = 4,920,520.67
  5. Step 5: Solve for x
    x = 4,920,520.67/3,325.98
  6. Step 6: Final answer
    x = 1,479.42

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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.