Home / 857,891.08-1,285,999.86-408,491.20

Finding the Fourth Proportional to 857,891.08, 1,285,999.86 and 408,491.20

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Solution

The fourth proportional to 857,891.08, 1,285,999.86 and 408,491.20 is: 612,338.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,891.08 : 1,285,999.86 = 408,491.20 : x
  2. Step 2: Convert to fraction form
    857,891.08/1,285,999.86 = 408,491.20/x
  3. Step 3: Cross multiply
    857,891.08x = 1,285,999.86 × 408,491.20
  4. Step 4: Simplify right side
    857,891.08x = 525,319,626,011.23
  5. Step 5: Solve for x
    x = 525,319,626,011.23/857,891.08
  6. Step 6: Final answer
    x = 612,338.37

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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.