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Finding the Fourth Proportional to 330,842.80, 496,264.20 and 212,744.80

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Solution

The fourth proportional to 330,842.80, 496,264.20 and 212,744.80 is: 319,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,842.80 : 496,264.20 = 212,744.80 : x
  2. Step 2: Convert to fraction form
    330,842.80/496,264.20 = 212,744.80/x
  3. Step 3: Cross multiply
    330,842.80x = 496,264.20 × 212,744.80
  4. Step 4: Simplify right side
    330,842.80x = 105,577,627,976.16
  5. Step 5: Solve for x
    x = 105,577,627,976.16/330,842.80
  6. Step 6: Final answer
    x = 319,117.20

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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.