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Finding the Fourth Proportional to 289,818.40, 434,730.60 and 79,456.32

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Solution

The fourth proportional to 289,818.40, 434,730.60 and 79,456.32 is: 119,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,818.40 : 434,730.60 = 79,456.32 : x
  2. Step 2: Convert to fraction form
    289,818.40/434,730.60 = 79,456.32/x
  3. Step 3: Cross multiply
    289,818.40x = 434,730.60 × 79,456.32
  4. Step 4: Simplify right side
    289,818.40x = 34,542,093,667.39
  5. Step 5: Solve for x
    x = 34,542,093,667.39/289,818.40
  6. Step 6: Final answer
    x = 119,185.30

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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.