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Finding the Fourth Proportional to 660.98, 912.63 and 440.39

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Solution

The fourth proportional to 660.98, 912.63 and 440.39 is: 608.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.98 : 912.63 = 440.39 : x
  2. Step 2: Convert to fraction form
    660.98/912.63 = 440.39/x
  3. Step 3: Cross multiply
    660.98x = 912.63 × 440.39
  4. Step 4: Simplify right side
    660.98x = 401,917.06
  5. Step 5: Solve for x
    x = 401,917.06/660.98
  6. Step 6: Final answer
    x = 608.06

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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.