Home / 428,999.90-643,669.34-162,831.06

Finding the Fourth Proportional to 428,999.90, 643,669.34 and 162,831.06

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Solution

The fourth proportional to 428,999.90, 643,669.34 and 162,831.06 is: 244,310.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,999.90 : 643,669.34 = 162,831.06 : x
  2. Step 2: Convert to fraction form
    428,999.90/643,669.34 = 162,831.06/x
  3. Step 3: Cross multiply
    428,999.90x = 643,669.34 × 162,831.06
  4. Step 4: Simplify right side
    428,999.90x = 104,809,360,107.55
  5. Step 5: Solve for x
    x = 104,809,360,107.55/428,999.90
  6. Step 6: Final answer
    x = 244,310.92

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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.