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Finding the Fourth Proportional to 328.62, 493.05 and 157.50

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Solution

The fourth proportional to 328.62, 493.05 and 157.50 is: 236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.62 : 493.05 = 157.50 : x
  2. Step 2: Convert to fraction form
    328.62/493.05 = 157.50/x
  3. Step 3: Cross multiply
    328.62x = 493.05 × 157.50
  4. Step 4: Simplify right side
    328.62x = 77,655.38
  5. Step 5: Solve for x
    x = 77,655.38/328.62
  6. Step 6: Final answer
    x = 236.31

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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.