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Finding the Fourth Proportional to 2,856.12, 4,283.79 and 776.26

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Solution

The fourth proportional to 2,856.12, 4,283.79 and 776.26 is: 1,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.12 : 4,283.79 = 776.26 : x
  2. Step 2: Convert to fraction form
    2,856.12/4,283.79 = 776.26/x
  3. Step 3: Cross multiply
    2,856.12x = 4,283.79 × 776.26
  4. Step 4: Simplify right side
    2,856.12x = 3,325,334.83
  5. Step 5: Solve for x
    x = 3,325,334.83/2,856.12
  6. Step 6: Final answer
    x = 1,164.28

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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.