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Finding the Fourth Proportional to 639,638.51, 882,714.92 and 353,176.74

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Solution

The fourth proportional to 639,638.51, 882,714.92 and 353,176.74 is: 487,391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,638.51 : 882,714.92 = 353,176.74 : x
  2. Step 2: Convert to fraction form
    639,638.51/882,714.92 = 353,176.74/x
  3. Step 3: Cross multiply
    639,638.51x = 882,714.92 × 353,176.74
  4. Step 4: Simplify right side
    639,638.51x = 311,754,376,029.08
  5. Step 5: Solve for x
    x = 311,754,376,029.08/639,638.51
  6. Step 6: Final answer
    x = 487,391.51

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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.