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Finding the Fourth Proportional to 330,860.80, 496,291.20 and 212,762.80

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Solution

The fourth proportional to 330,860.80, 496,291.20 and 212,762.80 is: 319,144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,860.80 : 496,291.20 = 212,762.80 : x
  2. Step 2: Convert to fraction form
    330,860.80/496,291.20 = 212,762.80/x
  3. Step 3: Cross multiply
    330,860.80x = 496,291.20 × 212,762.80
  4. Step 4: Simplify right side
    330,860.80x = 105,592,305,327.36
  5. Step 5: Solve for x
    x = 105,592,305,327.36/330,860.80
  6. Step 6: Final answer
    x = 319,144.20

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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.