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Finding the Fourth Proportional to 660.92, 905.34 and 653.63

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Solution

The fourth proportional to 660.92, 905.34 and 653.63 is: 895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.92 : 905.34 = 653.63 : x
  2. Step 2: Convert to fraction form
    660.92/905.34 = 653.63/x
  3. Step 3: Cross multiply
    660.92x = 905.34 × 653.63
  4. Step 4: Simplify right side
    660.92x = 591,751.63
  5. Step 5: Solve for x
    x = 591,751.63/660.92
  6. Step 6: Final answer
    x = 895.35

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.