Home / 421,015.44-631,621.68-287,958.36

Finding the Fourth Proportional to 421,015.44, 631,621.68 and 287,958.36

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Solution

The fourth proportional to 421,015.44, 631,621.68 and 287,958.36 is: 432,004.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,015.44 : 631,621.68 = 287,958.36 : x
  2. Step 2: Convert to fraction form
    421,015.44/631,621.68 = 287,958.36/x
  3. Step 3: Cross multiply
    421,015.44x = 631,621.68 × 287,958.36
  4. Step 4: Simplify right side
    421,015.44x = 181,880,743,113.25
  5. Step 5: Solve for x
    x = 181,880,743,113.25/421,015.44
  6. Step 6: Final answer
    x = 432,004.92

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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.