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Finding the Fourth Proportional to 539,969.40, 809,953.62 and 165,991.80

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Solution

The fourth proportional to 539,969.40, 809,953.62 and 165,991.80 is: 248,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,969.40 : 809,953.62 = 165,991.80 : x
  2. Step 2: Convert to fraction form
    539,969.40/809,953.62 = 165,991.80/x
  3. Step 3: Cross multiply
    539,969.40x = 809,953.62 × 165,991.80
  4. Step 4: Simplify right side
    539,969.40x = 134,445,659,300.32
  5. Step 5: Solve for x
    x = 134,445,659,300.32/539,969.40
  6. Step 6: Final answer
    x = 248,987.55

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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.