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Finding the Fourth Proportional to 287,861.88, 431,689.08 and 121,662.84

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Solution

The fourth proportional to 287,861.88, 431,689.08 and 121,662.84 is: 182,450.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,861.88 : 431,689.08 = 121,662.84 : x
  2. Step 2: Convert to fraction form
    287,861.88/431,689.08 = 121,662.84/x
  3. Step 3: Cross multiply
    287,861.88x = 431,689.08 × 121,662.84
  4. Step 4: Simplify right side
    287,861.88x = 52,520,519,469.79
  5. Step 5: Solve for x
    x = 52,520,519,469.79/287,861.88
  6. Step 6: Final answer
    x = 182,450.42

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1.5x scale

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.