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Finding the Fourth Proportional to 442,912.40, 663,688.20 and 330,063.20

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Solution

The fourth proportional to 442,912.40, 663,688.20 and 330,063.20 is: 494,587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,912.40 : 663,688.20 = 330,063.20 : x
  2. Step 2: Convert to fraction form
    442,912.40/663,688.20 = 330,063.20/x
  3. Step 3: Cross multiply
    442,912.40x = 663,688.20 × 330,063.20
  4. Step 4: Simplify right side
    442,912.40x = 219,059,051,094.24
  5. Step 5: Solve for x
    x = 219,059,051,094.24/442,912.40
  6. Step 6: Final answer
    x = 494,587.76

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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.