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Finding the Fourth Proportional to 1,919.15, 2,873.35 and 992.71

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Solution

The fourth proportional to 1,919.15, 2,873.35 and 992.71 is: 1,486.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.15 : 2,873.35 = 992.71 : x
  2. Step 2: Convert to fraction form
    1,919.15/2,873.35 = 992.71/x
  3. Step 3: Cross multiply
    1,919.15x = 2,873.35 × 992.71
  4. Step 4: Simplify right side
    1,919.15x = 2,852,403.28
  5. Step 5: Solve for x
    x = 2,852,403.28/1,919.15
  6. Step 6: Final answer
    x = 1,486.28

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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.