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Finding the Fourth Proportional to 423,590.22, 635,365.89 and 143,109.90

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Solution

The fourth proportional to 423,590.22, 635,365.89 and 143,109.90 is: 214,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,590.22 : 635,365.89 = 143,109.90 : x
  2. Step 2: Convert to fraction form
    423,590.22/635,365.89 = 143,109.90/x
  3. Step 3: Cross multiply
    423,590.22x = 635,365.89 × 143,109.90
  4. Step 4: Simplify right side
    423,590.22x = 90,927,148,981.31
  5. Step 5: Solve for x
    x = 90,927,148,981.31/423,590.22
  6. Step 6: Final answer
    x = 214,658.28

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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.