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Finding the Fourth Proportional to 328.71, 492.40 and 152.76

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Solution

The fourth proportional to 328.71, 492.40 and 152.76 is: 228.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.71 : 492.40 = 152.76 : x
  2. Step 2: Convert to fraction form
    328.71/492.40 = 152.76/x
  3. Step 3: Cross multiply
    328.71x = 492.40 × 152.76
  4. Step 4: Simplify right side
    328.71x = 75,220.20
  5. Step 5: Solve for x
    x = 75,220.20/328.71
  6. Step 6: Final answer
    x = 228.84

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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.