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Finding the Fourth Proportional to 685,254.85, 945,640.25 and 379,324.76

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Solution

The fourth proportional to 685,254.85, 945,640.25 and 379,324.76 is: 523,461.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,254.85 : 945,640.25 = 379,324.76 : x
  2. Step 2: Convert to fraction form
    685,254.85/945,640.25 = 379,324.76/x
  3. Step 3: Cross multiply
    685,254.85x = 945,640.25 × 379,324.76
  4. Step 4: Simplify right side
    685,254.85x = 358,704,760,877.59
  5. Step 5: Solve for x
    x = 358,704,760,877.59/685,254.85
  6. Step 6: Final answer
    x = 523,461.83

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Double scale
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Similar ratio
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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.