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Finding the Fourth Proportional to 909,893.22, 1,364,790.54 and 278,808.87

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Solution

The fourth proportional to 909,893.22, 1,364,790.54 and 278,808.87 is: 418,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,893.22 : 1,364,790.54 = 278,808.87 : x
  2. Step 2: Convert to fraction form
    909,893.22/1,364,790.54 = 278,808.87/x
  3. Step 3: Cross multiply
    909,893.22x = 1,364,790.54 × 278,808.87
  4. Step 4: Simplify right side
    909,893.22x = 380,515,708,244.09
  5. Step 5: Solve for x
    x = 380,515,708,244.09/909,893.22
  6. Step 6: Final answer
    x = 418,198.20

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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.