Home / 820,405.44-1,230,600.86-287,801.70

Finding the Fourth Proportional to 820,405.44, 1,230,600.86 and 287,801.70

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Solution

The fourth proportional to 820,405.44, 1,230,600.86 and 287,801.70 is: 431,699.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,405.44 : 1,230,600.86 = 287,801.70 : x
  2. Step 2: Convert to fraction form
    820,405.44/1,230,600.86 = 287,801.70/x
  3. Step 3: Cross multiply
    820,405.44x = 1,230,600.86 × 287,801.70
  4. Step 4: Simplify right side
    820,405.44x = 354,169,019,529.46
  5. Step 5: Solve for x
    x = 354,169,019,529.46/820,405.44
  6. Step 6: Final answer
    x = 431,699.99

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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.