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Finding the Fourth Proportional to 688,081.29, 949,627.52 and 393,758.24

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Solution

The fourth proportional to 688,081.29, 949,627.52 and 393,758.24 is: 543,429.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,081.29 : 949,627.52 = 393,758.24 : x
  2. Step 2: Convert to fraction form
    688,081.29/949,627.52 = 393,758.24/x
  3. Step 3: Cross multiply
    688,081.29x = 949,627.52 × 393,758.24
  4. Step 4: Simplify right side
    688,081.29x = 373,923,665,478.06
  5. Step 5: Solve for x
    x = 373,923,665,478.06/688,081.29
  6. Step 6: Final answer
    x = 543,429.49

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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.