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Finding the Fourth Proportional to 2,015.54, 2,784.12 and 1,578.92

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Solution

The fourth proportional to 2,015.54, 2,784.12 and 1,578.92 is: 2,181.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.54 : 2,784.12 = 1,578.92 : x
  2. Step 2: Convert to fraction form
    2,015.54/2,784.12 = 1,578.92/x
  3. Step 3: Cross multiply
    2,015.54x = 2,784.12 × 1,578.92
  4. Step 4: Simplify right side
    2,015.54x = 4,395,902.75
  5. Step 5: Solve for x
    x = 4,395,902.75/2,015.54
  6. Step 6: Final answer
    x = 2,181.00

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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.