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Finding the Fourth Proportional to 1,055.36, 1,457.12 and 662.56

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Solution

The fourth proportional to 1,055.36, 1,457.12 and 662.56 is: 914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.36 : 1,457.12 = 662.56 : x
  2. Step 2: Convert to fraction form
    1,055.36/1,457.12 = 662.56/x
  3. Step 3: Cross multiply
    1,055.36x = 1,457.12 × 662.56
  4. Step 4: Simplify right side
    1,055.36x = 965,429.43
  5. Step 5: Solve for x
    x = 965,429.43/1,055.36
  6. Step 6: Final answer
    x = 914.79

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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.