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Finding the Fourth Proportional to 4,880.70, 6,734.94 and 2,890.90

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Solution

The fourth proportional to 4,880.70, 6,734.94 and 2,890.90 is: 3,989.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,880.70 : 6,734.94 = 2,890.90 : x
  2. Step 2: Convert to fraction form
    4,880.70/6,734.94 = 2,890.90/x
  3. Step 3: Cross multiply
    4,880.70x = 6,734.94 × 2,890.90
  4. Step 4: Simplify right side
    4,880.70x = 19,470,038.05
  5. Step 5: Solve for x
    x = 19,470,038.05/4,880.70
  6. Step 6: Final answer
    x = 3,989.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.