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Finding the Fourth Proportional to 639,497.85, 882,507.18 and 353,018.13

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Solution

The fourth proportional to 639,497.85, 882,507.18 and 353,018.13 is: 487,165.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,497.85 : 882,507.18 = 353,018.13 : x
  2. Step 2: Convert to fraction form
    639,497.85/882,507.18 = 353,018.13/x
  3. Step 3: Cross multiply
    639,497.85x = 882,507.18 × 353,018.13
  4. Step 4: Simplify right side
    639,497.85x = 311,541,034,395.17
  5. Step 5: Solve for x
    x = 311,541,034,395.17/639,497.85
  6. Step 6: Final answer
    x = 487,165.10

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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.