Home / 685,403.20-945,825.54-379,458.10

Finding the Fourth Proportional to 685,403.20, 945,825.54 and 379,458.10

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Solution

The fourth proportional to 685,403.20, 945,825.54 and 379,458.10 is: 523,635.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,403.20 : 945,825.54 = 379,458.10 : x
  2. Step 2: Convert to fraction form
    685,403.20/945,825.54 = 379,458.10/x
  3. Step 3: Cross multiply
    685,403.20x = 945,825.54 × 379,458.10
  4. Step 4: Simplify right side
    685,403.20x = 358,901,157,610.75
  5. Step 5: Solve for x
    x = 358,901,157,610.75/685,403.20
  6. Step 6: Final answer
    x = 523,635.08

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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.