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Finding the Fourth Proportional to 313.12, 430.13 and 268.84

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Solution

The fourth proportional to 313.12, 430.13 and 268.84 is: 369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.12 : 430.13 = 268.84 : x
  2. Step 2: Convert to fraction form
    313.12/430.13 = 268.84/x
  3. Step 3: Cross multiply
    313.12x = 430.13 × 268.84
  4. Step 4: Simplify right side
    313.12x = 115,636.15
  5. Step 5: Solve for x
    x = 115,636.15/313.12
  6. Step 6: Final answer
    x = 369.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.