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Finding the Fourth Proportional to 436,411.40, 654,617.10 and 140,923.40

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Solution

The fourth proportional to 436,411.40, 654,617.10 and 140,923.40 is: 211,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,411.40 : 654,617.10 = 140,923.40 : x
  2. Step 2: Convert to fraction form
    436,411.40/654,617.10 = 140,923.40/x
  3. Step 3: Cross multiply
    436,411.40x = 654,617.10 × 140,923.40
  4. Step 4: Simplify right side
    436,411.40x = 92,250,867,430.14
  5. Step 5: Solve for x
    x = 92,250,867,430.14/436,411.40
  6. Step 6: Final answer
    x = 211,385.10

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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.