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Finding the Fourth Proportional to 430,563.60, 645,845.40 and 131,041.80

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Solution

The fourth proportional to 430,563.60, 645,845.40 and 131,041.80 is: 196,562.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,563.60 : 645,845.40 = 131,041.80 : x
  2. Step 2: Convert to fraction form
    430,563.60/645,845.40 = 131,041.80/x
  3. Step 3: Cross multiply
    430,563.60x = 645,845.40 × 131,041.80
  4. Step 4: Simplify right side
    430,563.60x = 84,632,743,737.72
  5. Step 5: Solve for x
    x = 84,632,743,737.72/430,563.60
  6. Step 6: Final answer
    x = 196,562.70

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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.