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Finding the Fourth Proportional to 518,809.80, 777,485.70 and 412,375.80

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Solution

The fourth proportional to 518,809.80, 777,485.70 and 412,375.80 is: 617,984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,809.80 : 777,485.70 = 412,375.80 : x
  2. Step 2: Convert to fraction form
    518,809.80/777,485.70 = 412,375.80/x
  3. Step 3: Cross multiply
    518,809.80x = 777,485.70 × 412,375.80
  4. Step 4: Simplify right side
    518,809.80x = 320,616,287,526.06
  5. Step 5: Solve for x
    x = 320,616,287,526.06/518,809.80
  6. Step 6: Final answer
    x = 617,984.25

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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.