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Finding the Fourth Proportional to 1,210.98, 1,671.02 and 896.44

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Solution

The fourth proportional to 1,210.98, 1,671.02 and 896.44 is: 1,236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.98 : 1,671.02 = 896.44 : x
  2. Step 2: Convert to fraction form
    1,210.98/1,671.02 = 896.44/x
  3. Step 3: Cross multiply
    1,210.98x = 1,671.02 × 896.44
  4. Step 4: Simplify right side
    1,210.98x = 1,497,969.17
  5. Step 5: Solve for x
    x = 1,497,969.17/1,210.98
  6. Step 6: Final answer
    x = 1,236.99

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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.