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Finding the Fourth Proportional to 911,967.39, 1,368,098.09 and 280,880.91

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Solution

The fourth proportional to 911,967.39, 1,368,098.09 and 280,880.91 is: 421,366.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,967.39 : 1,368,098.09 = 280,880.91 : x
  2. Step 2: Convert to fraction form
    911,967.39/1,368,098.09 = 280,880.91/x
  3. Step 3: Cross multiply
    911,967.39x = 1,368,098.09 × 280,880.91
  4. Step 4: Simplify right side
    911,967.39x = 384,272,635,084.06
  5. Step 5: Solve for x
    x = 384,272,635,084.06/911,967.39
  6. Step 6: Final answer
    x = 421,366.64

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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.