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Finding the Fourth Proportional to 685,221.17, 945,593.75 and 379,290.99

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Solution

The fourth proportional to 685,221.17, 945,593.75 and 379,290.99 is: 523,415.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,221.17 : 945,593.75 = 379,290.99 : x
  2. Step 2: Convert to fraction form
    685,221.17/945,593.75 = 379,290.99/x
  3. Step 3: Cross multiply
    685,221.17x = 945,593.75 × 379,290.99
  4. Step 4: Simplify right side
    685,221.17x = 358,655,187,678.86
  5. Step 5: Solve for x
    x = 358,655,187,678.86/685,221.17
  6. Step 6: Final answer
    x = 523,415.22

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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.