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Finding the Fourth Proportional to 685,090.05, 945,404.70 and 379,178.97

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Solution

The fourth proportional to 685,090.05, 945,404.70 and 379,178.97 is: 523,256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,090.05 : 945,404.70 = 379,178.97 : x
  2. Step 2: Convert to fraction form
    685,090.05/945,404.70 = 379,178.97/x
  3. Step 3: Cross multiply
    685,090.05x = 945,404.70 × 379,178.97
  4. Step 4: Simplify right side
    685,090.05x = 358,477,580,379.16
  5. Step 5: Solve for x
    x = 358,477,580,379.16/685,090.05
  6. Step 6: Final answer
    x = 523,256.15

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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.