Home / 287,687.03-431,529.93-77,324.96

Finding the Fourth Proportional to 287,687.03, 431,529.93 and 77,324.96

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Solution

The fourth proportional to 287,687.03, 431,529.93 and 77,324.96 is: 115,987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,687.03 : 431,529.93 = 77,324.96 : x
  2. Step 2: Convert to fraction form
    287,687.03/431,529.93 = 77,324.96/x
  3. Step 3: Cross multiply
    287,687.03x = 431,529.93 × 77,324.96
  4. Step 4: Simplify right side
    287,687.03x = 33,368,035,654.88
  5. Step 5: Solve for x
    x = 33,368,035,654.88/287,687.03
  6. Step 6: Final answer
    x = 115,987.28

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1.5x scale

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.