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Finding the Fourth Proportional to 1,267.54, 1,895.91 and 990.34

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Solution

The fourth proportional to 1,267.54, 1,895.91 and 990.34 is: 1,481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.54 : 1,895.91 = 990.34 : x
  2. Step 2: Convert to fraction form
    1,267.54/1,895.91 = 990.34/x
  3. Step 3: Cross multiply
    1,267.54x = 1,895.91 × 990.34
  4. Step 4: Simplify right side
    1,267.54x = 1,877,595.51
  5. Step 5: Solve for x
    x = 1,877,595.51/1,267.54
  6. Step 6: Final answer
    x = 1,481.29

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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.