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Finding the Fourth Proportional to 505.51, 757.56 and 440.35

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Solution

The fourth proportional to 505.51, 757.56 and 440.35 is: 659.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.51 : 757.56 = 440.35 : x
  2. Step 2: Convert to fraction form
    505.51/757.56 = 440.35/x
  3. Step 3: Cross multiply
    505.51x = 757.56 × 440.35
  4. Step 4: Simplify right side
    505.51x = 333,591.30
  5. Step 5: Solve for x
    x = 333,591.30/505.51
  6. Step 6: Final answer
    x = 659.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.