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Finding the Fourth Proportional to 662.44, 918.85 and 644.68

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Solution

The fourth proportional to 662.44, 918.85 and 644.68 is: 894.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.44 : 918.85 = 644.68 : x
  2. Step 2: Convert to fraction form
    662.44/918.85 = 644.68/x
  3. Step 3: Cross multiply
    662.44x = 918.85 × 644.68
  4. Step 4: Simplify right side
    662.44x = 592,364.22
  5. Step 5: Solve for x
    x = 592,364.22/662.44
  6. Step 6: Final answer
    x = 894.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.