Home / 521,985.26-720,305.54-307,083.80

Finding the Fourth Proportional to 521,985.26, 720,305.54 and 307,083.80

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Solution

The fourth proportional to 521,985.26, 720,305.54 and 307,083.80 is: 423,755.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,985.26 : 720,305.54 = 307,083.80 : x
  2. Step 2: Convert to fraction form
    521,985.26/720,305.54 = 307,083.80/x
  3. Step 3: Cross multiply
    521,985.26x = 720,305.54 × 307,083.80
  4. Step 4: Simplify right side
    521,985.26x = 221,194,162,384.25
  5. Step 5: Solve for x
    x = 221,194,162,384.25/521,985.26
  6. Step 6: Final answer
    x = 423,755.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.