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Finding the Fourth Proportional to 1,055.44, 1,456.45 and 662.68

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Solution

The fourth proportional to 1,055.44, 1,456.45 and 662.68 is: 914.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.44 : 1,456.45 = 662.68 : x
  2. Step 2: Convert to fraction form
    1,055.44/1,456.45 = 662.68/x
  3. Step 3: Cross multiply
    1,055.44x = 1,456.45 × 662.68
  4. Step 4: Simplify right side
    1,055.44x = 965,160.29
  5. Step 5: Solve for x
    x = 965,160.29/1,055.44
  6. Step 6: Final answer
    x = 914.46

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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.