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Finding the Fourth Proportional to 2,890.99, 4,354.49 and 2,688.22

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Solution

The fourth proportional to 2,890.99, 4,354.49 and 2,688.22 is: 4,049.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.99 : 4,354.49 = 2,688.22 : x
  2. Step 2: Convert to fraction form
    2,890.99/4,354.49 = 2,688.22/x
  3. Step 3: Cross multiply
    2,890.99x = 4,354.49 × 2,688.22
  4. Step 4: Simplify right side
    2,890.99x = 11,705,827.11
  5. Step 5: Solve for x
    x = 11,705,827.11/2,890.99
  6. Step 6: Final answer
    x = 4,049.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.