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Finding the Fourth Proportional to 289,687.20, 434,271.60 and 189,895.20

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Solution

The fourth proportional to 289,687.20, 434,271.60 and 189,895.20 is: 284,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,687.20 : 434,271.60 = 189,895.20 : x
  2. Step 2: Convert to fraction form
    289,687.20/434,271.60 = 189,895.20/x
  3. Step 3: Cross multiply
    289,687.20x = 434,271.60 × 189,895.20
  4. Step 4: Simplify right side
    289,687.20x = 82,466,092,336.32
  5. Step 5: Solve for x
    x = 82,466,092,336.32/289,687.20
  6. Step 6: Final answer
    x = 284,672.89

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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.