Home / 857,999.79-1,287,338.67-325,662.12

Finding the Fourth Proportional to 857,999.79, 1,287,338.67 and 325,662.12

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Solution

The fourth proportional to 857,999.79, 1,287,338.67 and 325,662.12 is: 488,621.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,999.79 : 1,287,338.67 = 325,662.12 : x
  2. Step 2: Convert to fraction form
    857,999.79/1,287,338.67 = 325,662.12/x
  3. Step 3: Cross multiply
    857,999.79x = 1,287,338.67 × 325,662.12
  4. Step 4: Simplify right side
    857,999.79x = 419,237,440,430.18
  5. Step 5: Solve for x
    x = 419,237,440,430.18/857,999.79
  6. Step 6: Final answer
    x = 488,621.85

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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.