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Finding the Fourth Proportional to 485,590.87, 670,164.39 and 281,704.15

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Solution

The fourth proportional to 485,590.87, 670,164.39 and 281,704.15 is: 388,780.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,590.87 : 670,164.39 = 281,704.15 : x
  2. Step 2: Convert to fraction form
    485,590.87/670,164.39 = 281,704.15/x
  3. Step 3: Cross multiply
    485,590.87x = 670,164.39 × 281,704.15
  4. Step 4: Simplify right side
    485,590.87x = 188,788,085,085.88
  5. Step 5: Solve for x
    x = 188,788,085,085.88/485,590.87
  6. Step 6: Final answer
    x = 388,780.14

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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.