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Finding the Fourth Proportional to 636,128.80, 954,193.20 and 531,930.40

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Solution

The fourth proportional to 636,128.80, 954,193.20 and 531,930.40 is: 797,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,128.80 : 954,193.20 = 531,930.40 : x
  2. Step 2: Convert to fraction form
    636,128.80/954,193.20 = 531,930.40/x
  3. Step 3: Cross multiply
    636,128.80x = 954,193.20 × 531,930.40
  4. Step 4: Simplify right side
    636,128.80x = 507,564,370,553.28
  5. Step 5: Solve for x
    x = 507,564,370,553.28/636,128.80
  6. Step 6: Final answer
    x = 797,895.60

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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.