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Finding the Fourth Proportional to 2,858.79, 4,288.88 and 910.99

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Solution

The fourth proportional to 2,858.79, 4,288.88 and 910.99 is: 1,366.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.79 : 4,288.88 = 910.99 : x
  2. Step 2: Convert to fraction form
    2,858.79/4,288.88 = 910.99/x
  3. Step 3: Cross multiply
    2,858.79x = 4,288.88 × 910.99
  4. Step 4: Simplify right side
    2,858.79x = 3,907,131.01
  5. Step 5: Solve for x
    x = 3,907,131.01/2,858.79
  6. Step 6: Final answer
    x = 1,366.71

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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.