Home / 918,865.76-1,378,297.82-287,828.80

Finding the Fourth Proportional to 918,865.76, 1,378,297.82 and 287,828.80

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Solution

The fourth proportional to 918,865.76, 1,378,297.82 and 287,828.80 is: 431,742.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,865.76 : 1,378,297.82 = 287,828.80 : x
  2. Step 2: Convert to fraction form
    918,865.76/1,378,297.82 = 287,828.80/x
  3. Step 3: Cross multiply
    918,865.76x = 1,378,297.82 × 287,828.80
  4. Step 4: Simplify right side
    918,865.76x = 396,713,807,573.22
  5. Step 5: Solve for x
    x = 396,713,807,573.22/918,865.76
  6. Step 6: Final answer
    x = 431,742.94

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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.