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Finding the Fourth Proportional to 313.07, 431.66 and 295.75

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Solution

The fourth proportional to 313.07, 431.66 and 295.75 is: 407.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.07 : 431.66 = 295.75 : x
  2. Step 2: Convert to fraction form
    313.07/431.66 = 295.75/x
  3. Step 3: Cross multiply
    313.07x = 431.66 × 295.75
  4. Step 4: Simplify right side
    313.07x = 127,664.72
  5. Step 5: Solve for x
    x = 127,664.72/313.07
  6. Step 6: Final answer
    x = 407.79

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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.