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Finding the Fourth Proportional to 3,294.90, 4,940.67 and 986.10

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Solution

The fourth proportional to 3,294.90, 4,940.67 and 986.10 is: 1,478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,294.90 : 4,940.67 = 986.10 : x
  2. Step 2: Convert to fraction form
    3,294.90/4,940.67 = 986.10/x
  3. Step 3: Cross multiply
    3,294.90x = 4,940.67 × 986.10
  4. Step 4: Simplify right side
    3,294.90x = 4,871,994.69
  5. Step 5: Solve for x
    x = 4,871,994.69/3,294.90
  6. Step 6: Final answer
    x = 1,478.65

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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.