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Finding the Fourth Proportional to 353,408.91, 530,158.91 and 128,734.71

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Solution

The fourth proportional to 353,408.91, 530,158.91 and 128,734.71 is: 193,118.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,408.91 : 530,158.91 = 128,734.71 : x
  2. Step 2: Convert to fraction form
    353,408.91/530,158.91 = 128,734.71/x
  3. Step 3: Cross multiply
    353,408.91x = 530,158.91 × 128,734.71
  4. Step 4: Simplify right side
    353,408.91x = 68,249,852,889.09
  5. Step 5: Solve for x
    x = 68,249,852,889.09/353,408.91
  6. Step 6: Final answer
    x = 193,118.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.