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Finding the Fourth Proportional to 268.63, 370.79 and 210.31

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Solution

The fourth proportional to 268.63, 370.79 and 210.31 is: 290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.63 : 370.79 = 210.31 : x
  2. Step 2: Convert to fraction form
    268.63/370.79 = 210.31/x
  3. Step 3: Cross multiply
    268.63x = 370.79 × 210.31
  4. Step 4: Simplify right side
    268.63x = 77,980.84
  5. Step 5: Solve for x
    x = 77,980.84/268.63
  6. Step 6: Final answer
    x = 290.29

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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.