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Finding the Fourth Proportional to 321,053.09, 481,813.13 and 258,626.84

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Solution

The fourth proportional to 321,053.09, 481,813.13 and 258,626.84 is: 388,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,053.09 : 481,813.13 = 258,626.84 : x
  2. Step 2: Convert to fraction form
    321,053.09/481,813.13 = 258,626.84/x
  3. Step 3: Cross multiply
    321,053.09x = 481,813.13 × 258,626.84
  4. Step 4: Simplify right side
    321,053.09x = 124,609,805,519.91
  5. Step 5: Solve for x
    x = 124,609,805,519.91/321,053.09
  6. Step 6: Final answer
    x = 388,128.35

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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.