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Finding the Fourth Proportional to 1,053.43, 1,453.69 and 660.67

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Solution

The fourth proportional to 1,053.43, 1,453.69 and 660.67 is: 911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.43 : 1,453.69 = 660.67 : x
  2. Step 2: Convert to fraction form
    1,053.43/1,453.69 = 660.67/x
  3. Step 3: Cross multiply
    1,053.43x = 1,453.69 × 660.67
  4. Step 4: Simplify right side
    1,053.43x = 960,409.37
  5. Step 5: Solve for x
    x = 960,409.37/1,053.43
  6. Step 6: Final answer
    x = 911.70

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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.