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Finding the Fourth Proportional to 268.48, 370.16 and 210.16

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Solution

The fourth proportional to 268.48, 370.16 and 210.16 is: 289.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.48 : 370.16 = 210.16 : x
  2. Step 2: Convert to fraction form
    268.48/370.16 = 210.16/x
  3. Step 3: Cross multiply
    268.48x = 370.16 × 210.16
  4. Step 4: Simplify right side
    268.48x = 77,792.83
  5. Step 5: Solve for x
    x = 77,792.83/268.48
  6. Step 6: Final answer
    x = 289.75

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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.