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Finding the Fourth Proportional to 328,492.64, 492,738.96 and 79,174.64

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Solution

The fourth proportional to 328,492.64, 492,738.96 and 79,174.64 is: 118,761.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,492.64 : 492,738.96 = 79,174.64 : x
  2. Step 2: Convert to fraction form
    328,492.64/492,738.96 = 79,174.64/x
  3. Step 3: Cross multiply
    328,492.64x = 492,738.96 × 79,174.64
  4. Step 4: Simplify right side
    328,492.64x = 39,012,429,771.97
  5. Step 5: Solve for x
    x = 39,012,429,771.97/328,492.64
  6. Step 6: Final answer
    x = 118,761.96

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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.