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Finding the Fourth Proportional to 911,992.64, 1,368,135.96 and 280,906.16

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Solution

The fourth proportional to 911,992.64, 1,368,135.96 and 280,906.16 is: 421,404.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,992.64 : 1,368,135.96 = 280,906.16 : x
  2. Step 2: Convert to fraction form
    911,992.64/1,368,135.96 = 280,906.16/x
  3. Step 3: Cross multiply
    911,992.64x = 1,368,135.96 × 280,906.16
  4. Step 4: Simplify right side
    911,992.64x = 384,317,818,881.51
  5. Step 5: Solve for x
    x = 384,317,818,881.51/911,992.64
  6. Step 6: Final answer
    x = 421,404.52

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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.