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Finding the Fourth Proportional to 639,615.92, 882,671.28 and 353,136.56

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Solution

The fourth proportional to 639,615.92, 882,671.28 and 353,136.56 is: 487,329.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,615.92 : 882,671.28 = 353,136.56 : x
  2. Step 2: Convert to fraction form
    639,615.92/882,671.28 = 353,136.56/x
  3. Step 3: Cross multiply
    639,615.92x = 882,671.28 × 353,136.56
  4. Step 4: Simplify right side
    639,615.92x = 311,703,499,430.00
  5. Step 5: Solve for x
    x = 311,703,499,430.00/639,615.92
  6. Step 6: Final answer
    x = 487,329.18

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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.