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Finding the Fourth Proportional to 639,598.17, 882,646.79 and 353,118.81

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Solution

The fourth proportional to 639,598.17, 882,646.79 and 353,118.81 is: 487,304.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,598.17 : 882,646.79 = 353,118.81 : x
  2. Step 2: Convert to fraction form
    639,598.17/882,646.79 = 353,118.81/x
  3. Step 3: Cross multiply
    639,598.17x = 882,646.79 × 353,118.81
  4. Step 4: Simplify right side
    639,598.17x = 311,679,182,369.53
  5. Step 5: Solve for x
    x = 311,679,182,369.53/639,598.17
  6. Step 6: Final answer
    x = 487,304.68

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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.