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Finding the Fourth Proportional to 685,714.35, 946,264.86 and 379,778.55

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Solution

The fourth proportional to 685,714.35, 946,264.86 and 379,778.55 is: 524,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,714.35 : 946,264.86 = 379,778.55 : x
  2. Step 2: Convert to fraction form
    685,714.35/946,264.86 = 379,778.55/x
  3. Step 3: Cross multiply
    685,714.35x = 946,264.86 × 379,778.55
  4. Step 4: Simplify right side
    685,714.35x = 359,371,096,446.75
  5. Step 5: Solve for x
    x = 359,371,096,446.75/685,714.35
  6. Step 6: Final answer
    x = 524,082.80

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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.