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Finding the Fourth Proportional to 330,003.40, 494,421.90 and 309,008.20

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Solution

The fourth proportional to 330,003.40, 494,421.90 and 309,008.20 is: 462,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,003.40 : 494,421.90 = 309,008.20 : x
  2. Step 2: Convert to fraction form
    330,003.40/494,421.90 = 309,008.20/x
  3. Step 3: Cross multiply
    330,003.40x = 494,421.90 × 309,008.20
  4. Step 4: Simplify right side
    330,003.40x = 152,780,421,359.58
  5. Step 5: Solve for x
    x = 152,780,421,359.58/330,003.40
  6. Step 6: Final answer
    x = 462,966.20

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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.