Home / 858,120.49-1,287,388.77-259,045.84

Finding the Fourth Proportional to 858,120.49, 1,287,388.77 and 259,045.84

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Solution

The fourth proportional to 858,120.49, 1,287,388.77 and 259,045.84 is: 388,631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,120.49 : 1,287,388.77 = 259,045.84 : x
  2. Step 2: Convert to fraction form
    858,120.49/1,287,388.77 = 259,045.84/x
  3. Step 3: Cross multiply
    858,120.49x = 1,287,388.77 × 259,045.84
  4. Step 4: Simplify right side
    858,120.49x = 333,492,705,331.22
  5. Step 5: Solve for x
    x = 333,492,705,331.22/858,120.49
  6. Step 6: Final answer
    x = 388,631.56

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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.