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Finding the Fourth Proportional to 492,885.09, 680,249.51 and 288,986.22

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Solution

The fourth proportional to 492,885.09, 680,249.51 and 288,986.22 is: 398,840.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,885.09 : 680,249.51 = 288,986.22 : x
  2. Step 2: Convert to fraction form
    492,885.09/680,249.51 = 288,986.22/x
  3. Step 3: Cross multiply
    492,885.09x = 680,249.51 × 288,986.22
  4. Step 4: Simplify right side
    492,885.09x = 196,582,734,551.75
  5. Step 5: Solve for x
    x = 196,582,734,551.75/492,885.09
  6. Step 6: Final answer
    x = 398,840.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.