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Finding the Fourth Proportional to 289,426.80, 434,140.20 and 263,161.20

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Solution

The fourth proportional to 289,426.80, 434,140.20 and 263,161.20 is: 394,741.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,426.80 : 434,140.20 = 263,161.20 : x
  2. Step 2: Convert to fraction form
    289,426.80/434,140.20 = 263,161.20/x
  3. Step 3: Cross multiply
    289,426.80x = 434,140.20 × 263,161.20
  4. Step 4: Simplify right side
    289,426.80x = 114,248,856,000.24
  5. Step 5: Solve for x
    x = 114,248,856,000.24/289,426.80
  6. Step 6: Final answer
    x = 394,741.80

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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.