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Finding the Fourth Proportional to 2,115, 2,920.05 and 1,893.56

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Solution

The fourth proportional to 2,115, 2,920.05 and 1,893.56 is: 2,614.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115 : 2,920.05 = 1,893.56 : x
  2. Step 2: Convert to fraction form
    2,115/2,920.05 = 1,893.56/x
  3. Step 3: Cross multiply
    2,115x = 2,920.05 × 1,893.56
  4. Step 4: Simplify right side
    2,115x = 5,529,275.28
  5. Step 5: Solve for x
    x = 5,529,275.28/2,115
  6. Step 6: Final answer
    x = 2,614.31

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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.