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Finding the Fourth Proportional to 444.64, 663.16 and 440.16

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Solution

The fourth proportional to 444.64, 663.16 and 440.16 is: 656.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.64 : 663.16 = 440.16 : x
  2. Step 2: Convert to fraction form
    444.64/663.16 = 440.16/x
  3. Step 3: Cross multiply
    444.64x = 663.16 × 440.16
  4. Step 4: Simplify right side
    444.64x = 291,896.51
  5. Step 5: Solve for x
    x = 291,896.51/444.64
  6. Step 6: Final answer
    x = 656.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.