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Finding the Fourth Proportional to 328,410.21, 492,615.33 and 79,092.21

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Solution

The fourth proportional to 328,410.21, 492,615.33 and 79,092.21 is: 118,638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,410.21 : 492,615.33 = 79,092.21 : x
  2. Step 2: Convert to fraction form
    328,410.21/492,615.33 = 79,092.21/x
  3. Step 3: Cross multiply
    328,410.21x = 492,615.33 × 79,092.21
  4. Step 4: Simplify right side
    328,410.21x = 38,962,035,129.58
  5. Step 5: Solve for x
    x = 38,962,035,129.58/328,410.21
  6. Step 6: Final answer
    x = 118,638.32

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Similar ratio
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1.5x scale

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.