Home / 505,118.49-697,079.79-287,321.55

Finding the Fourth Proportional to 505,118.49, 697,079.79 and 287,321.55

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Solution

The fourth proportional to 505,118.49, 697,079.79 and 287,321.55 is: 396,513.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,118.49 : 697,079.79 = 287,321.55 : x
  2. Step 2: Convert to fraction form
    505,118.49/697,079.79 = 287,321.55/x
  3. Step 3: Cross multiply
    505,118.49x = 697,079.79 × 287,321.55
  4. Step 4: Simplify right side
    505,118.49x = 200,286,045,736.48
  5. Step 5: Solve for x
    x = 200,286,045,736.48/505,118.49
  6. Step 6: Final answer
    x = 396,513.00

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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.