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Finding the Fourth Proportional to 328,904.80, 493,357.20 and 79,586.80

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Solution

The fourth proportional to 328,904.80, 493,357.20 and 79,586.80 is: 119,380.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,904.80 : 493,357.20 = 79,586.80 : x
  2. Step 2: Convert to fraction form
    328,904.80/493,357.20 = 79,586.80/x
  3. Step 3: Cross multiply
    328,904.80x = 493,357.20 × 79,586.80
  4. Step 4: Simplify right side
    328,904.80x = 39,264,720,804.96
  5. Step 5: Solve for x
    x = 39,264,720,804.96/328,904.80
  6. Step 6: Final answer
    x = 119,380.20

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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.