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Finding the Fourth Proportional to 458,107.65, 687,429.45 and 191,845.80

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Solution

The fourth proportional to 458,107.65, 687,429.45 and 191,845.80 is: 287,880.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,107.65 : 687,429.45 = 191,845.80 : x
  2. Step 2: Convert to fraction form
    458,107.65/687,429.45 = 191,845.80/x
  3. Step 3: Cross multiply
    458,107.65x = 687,429.45 × 191,845.80
  4. Step 4: Simplify right side
    458,107.65x = 131,880,452,778.81
  5. Step 5: Solve for x
    x = 131,880,452,778.81/458,107.65
  6. Step 6: Final answer
    x = 287,880.92

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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.