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Finding the Fourth Proportional to 911,885.55, 1,367,855.98 and 312,838.03

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Solution

The fourth proportional to 911,885.55, 1,367,855.98 and 312,838.03 is: 469,266.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,885.55 : 1,367,855.98 = 312,838.03 : x
  2. Step 2: Convert to fraction form
    911,885.55/1,367,855.98 = 312,838.03/x
  3. Step 3: Cross multiply
    911,885.55x = 1,367,855.98 × 312,838.03
  4. Step 4: Simplify right side
    911,885.55x = 427,917,371,034.64
  5. Step 5: Solve for x
    x = 427,917,371,034.64/911,885.55
  6. Step 6: Final answer
    x = 469,266.54

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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.