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Finding the Fourth Proportional to 328,300.88, 492,451.32 and 78,982.88

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Solution

The fourth proportional to 328,300.88, 492,451.32 and 78,982.88 is: 118,474.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,300.88 : 492,451.32 = 78,982.88 : x
  2. Step 2: Convert to fraction form
    328,300.88/492,451.32 = 78,982.88/x
  3. Step 3: Cross multiply
    328,300.88x = 492,451.32 × 78,982.88
  4. Step 4: Simplify right side
    328,300.88x = 38,895,221,051.15
  5. Step 5: Solve for x
    x = 38,895,221,051.15/328,300.88
  6. Step 6: Final answer
    x = 118,474.31

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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.