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Finding the Fourth Proportional to 456,078.80, 684,118.20 and 189,750.80

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Solution

The fourth proportional to 456,078.80, 684,118.20 and 189,750.80 is: 284,626.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,078.80 : 684,118.20 = 189,750.80 : x
  2. Step 2: Convert to fraction form
    456,078.80/684,118.20 = 189,750.80/x
  3. Step 3: Cross multiply
    456,078.80x = 684,118.20 × 189,750.80
  4. Step 4: Simplify right side
    456,078.80x = 129,811,975,744.56
  5. Step 5: Solve for x
    x = 129,811,975,744.56/456,078.80
  6. Step 6: Final answer
    x = 284,626.20

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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.