Home / 485,239.68-669,644.82-281,291.40

Finding the Fourth Proportional to 485,239.68, 669,644.82 and 281,291.40

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Solution

The fourth proportional to 485,239.68, 669,644.82 and 281,291.40 is: 388,190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,239.68 : 669,644.82 = 281,291.40 : x
  2. Step 2: Convert to fraction form
    485,239.68/669,644.82 = 281,291.40/x
  3. Step 3: Cross multiply
    485,239.68x = 669,644.82 × 281,291.40
  4. Step 4: Simplify right side
    485,239.68x = 188,365,328,920.55
  5. Step 5: Solve for x
    x = 188,365,328,920.55/485,239.68
  6. Step 6: Final answer
    x = 388,190.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.