Home / 917,021.80-1,375,532.70-285,930.60

Finding the Fourth Proportional to 917,021.80, 1,375,532.70 and 285,930.60

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Solution

The fourth proportional to 917,021.80, 1,375,532.70 and 285,930.60 is: 428,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,021.80 : 1,375,532.70 = 285,930.60 : x
  2. Step 2: Convert to fraction form
    917,021.80/1,375,532.70 = 285,930.60/x
  3. Step 3: Cross multiply
    917,021.80x = 1,375,532.70 × 285,930.60
  4. Step 4: Simplify right side
    917,021.80x = 393,306,890,230.62
  5. Step 5: Solve for x
    x = 393,306,890,230.62/917,021.80
  6. Step 6: Final answer
    x = 428,895.90

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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.