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Finding the Fourth Proportional to 268.35, 370.30 and 156.30

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Solution

The fourth proportional to 268.35, 370.30 and 156.30 is: 215.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.35 : 370.30 = 156.30 : x
  2. Step 2: Convert to fraction form
    268.35/370.30 = 156.30/x
  3. Step 3: Cross multiply
    268.35x = 370.30 × 156.30
  4. Step 4: Simplify right side
    268.35x = 57,877.89
  5. Step 5: Solve for x
    x = 57,877.89/268.35
  6. Step 6: Final answer
    x = 215.68

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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.