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Finding the Fourth Proportional to 328.60, 492.70 and 155.03

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Solution

The fourth proportional to 328.60, 492.70 and 155.03 is: 232.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.60 : 492.70 = 155.03 : x
  2. Step 2: Convert to fraction form
    328.60/492.70 = 155.03/x
  3. Step 3: Cross multiply
    328.60x = 492.70 × 155.03
  4. Step 4: Simplify right side
    328.60x = 76,383.28
  5. Step 5: Solve for x
    x = 76,383.28/328.60
  6. Step 6: Final answer
    x = 232.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.