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Finding the Fourth Proportional to 686,668,998.88, 947,628,138.08 and 393,370,253.92

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Solution

The fourth proportional to 686,668,998.88, 947,628,138.08 and 393,370,253.92 is: 542,865,226.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,668,998.88 : 947,628,138.08 = 393,370,253.92 : x
  2. Step 2: Convert to fraction form
    686,668,998.88/947,628,138.08 = 393,370,253.92/x
  3. Step 3: Cross multiply
    686,668,998.88x = 947,628,138.08 × 393,370,253.92
  4. Step 4: Simplify right side
    686,668,998.88x = 372,768,721,298,266,432
  5. Step 5: Solve for x
    x = 372,768,721,298,266,432/686,668,998.88
  6. Step 6: Final answer
    x = 542,865,226.05

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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.