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Finding the Fourth Proportional to 442,061.40, 663,092.10 and 393,072.60

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Solution

The fourth proportional to 442,061.40, 663,092.10 and 393,072.60 is: 589,608.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,061.40 : 663,092.10 = 393,072.60 : x
  2. Step 2: Convert to fraction form
    442,061.40/663,092.10 = 393,072.60/x
  3. Step 3: Cross multiply
    442,061.40x = 663,092.10 × 393,072.60
  4. Step 4: Simplify right side
    442,061.40x = 260,643,335,786.46
  5. Step 5: Solve for x
    x = 260,643,335,786.46/442,061.40
  6. Step 6: Final answer
    x = 589,608.90

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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.