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Finding the Fourth Proportional to 639,561.32, 882,710.16 and 381,454.82

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Solution

The fourth proportional to 639,561.32, 882,710.16 and 381,454.82 is: 526,476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,561.32 : 882,710.16 = 381,454.82 : x
  2. Step 2: Convert to fraction form
    639,561.32/882,710.16 = 381,454.82/x
  3. Step 3: Cross multiply
    639,561.32x = 882,710.16 × 381,454.82
  4. Step 4: Simplify right side
    639,561.32x = 336,714,045,194.97
  5. Step 5: Solve for x
    x = 336,714,045,194.97/639,561.32
  6. Step 6: Final answer
    x = 526,476.56

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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.