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Finding the Fourth Proportional to 911,889.05, 1,367,861.24 and 312,841.54

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Solution

The fourth proportional to 911,889.05, 1,367,861.24 and 312,841.54 is: 469,271.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,889.05 : 1,367,861.24 = 312,841.54 : x
  2. Step 2: Convert to fraction form
    911,889.05/1,367,861.24 = 312,841.54/x
  3. Step 3: Cross multiply
    911,889.05x = 1,367,861.24 × 312,841.54
  4. Step 4: Simplify right side
    911,889.05x = 427,923,808,424.40
  5. Step 5: Solve for x
    x = 427,923,808,424.40/911,889.05
  6. Step 6: Final answer
    x = 469,271.79

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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.