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Finding the Fourth Proportional to 493,630.81, 680,993.53 and 289,578.24

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Solution

The fourth proportional to 493,630.81, 680,993.53 and 289,578.24 is: 399,490.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,630.81 : 680,993.53 = 289,578.24 : x
  2. Step 2: Convert to fraction form
    493,630.81/680,993.53 = 289,578.24/x
  3. Step 3: Cross multiply
    493,630.81x = 680,993.53 × 289,578.24
  4. Step 4: Simplify right side
    493,630.81x = 197,200,907,144.84
  5. Step 5: Solve for x
    x = 197,200,907,144.84/493,630.81
  6. Step 6: Final answer
    x = 399,490.68

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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.