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Finding the Fourth Proportional to 2,858.63, 4,287.94 and 910.98

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Solution

The fourth proportional to 2,858.63, 4,287.94 and 910.98 is: 1,366.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.63 : 4,287.94 = 910.98 : x
  2. Step 2: Convert to fraction form
    2,858.63/4,287.94 = 910.98/x
  3. Step 3: Cross multiply
    2,858.63x = 4,287.94 × 910.98
  4. Step 4: Simplify right side
    2,858.63x = 3,906,225.30
  5. Step 5: Solve for x
    x = 3,906,225.30/2,858.63
  6. Step 6: Final answer
    x = 1,366.47

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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.