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Finding the Fourth Proportional to 638,866.35, 881,636.30 and 366,986.90

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Solution

The fourth proportional to 638,866.35, 881,636.30 and 366,986.90 is: 506,442.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,866.35 : 881,636.30 = 366,986.90 : x
  2. Step 2: Convert to fraction form
    638,866.35/881,636.30 = 366,986.90/x
  3. Step 3: Cross multiply
    638,866.35x = 881,636.30 × 366,986.90
  4. Step 4: Simplify right side
    638,866.35x = 323,548,972,664.47
  5. Step 5: Solve for x
    x = 323,548,972,664.47/638,866.35
  6. Step 6: Final answer
    x = 506,442.35

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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.