Home / 522,866,218.50-721,555,379.91-287,916,319.26

Finding the Fourth Proportional to 522,866,218.50, 721,555,379.91 and 287,916,319.26

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Solution

The fourth proportional to 522,866,218.50, 721,555,379.91 and 287,916,319.26 is: 397,324,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,866,218.50 : 721,555,379.91 = 287,916,319.26 : x
  2. Step 2: Convert to fraction form
    522,866,218.50/721,555,379.91 = 287,916,319.26/x
  3. Step 3: Cross multiply
    522,866,218.50x = 721,555,379.91 × 287,916,319.26
  4. Step 4: Simplify right side
    522,866,218.50x = 207,747,569,125,938,144
  5. Step 5: Solve for x
    x = 207,747,569,125,938,144/522,866,218.50
  6. Step 6: Final answer
    x = 397,324,519.69

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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.