Home / 642,084.54-886,076.28-355,604.34

Finding the Fourth Proportional to 642,084.54, 886,076.28 and 355,604.34

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Solution

The fourth proportional to 642,084.54, 886,076.28 and 355,604.34 is: 490,733.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,084.54 : 886,076.28 = 355,604.34 : x
  2. Step 2: Convert to fraction form
    642,084.54/886,076.28 = 355,604.34/x
  3. Step 3: Cross multiply
    642,084.54x = 886,076.28 × 355,604.34
  4. Step 4: Simplify right side
    642,084.54x = 315,092,570,739.06
  5. Step 5: Solve for x
    x = 315,092,570,739.06/642,084.54
  6. Step 6: Final answer
    x = 490,733.78

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1.5x scale

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.