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Finding the Fourth Proportional to 442,859.40, 663,608.70 and 330,010.20

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Solution

The fourth proportional to 442,859.40, 663,608.70 and 330,010.20 is: 494,508.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,859.40 : 663,608.70 = 330,010.20 : x
  2. Step 2: Convert to fraction form
    442,859.40/663,608.70 = 330,010.20/x
  3. Step 3: Cross multiply
    442,859.40x = 663,608.70 × 330,010.20
  4. Step 4: Simplify right side
    442,859.40x = 218,997,639,808.74
  5. Step 5: Solve for x
    x = 218,997,639,808.74/442,859.40
  6. Step 6: Final answer
    x = 494,508.28

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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.