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Finding the Fourth Proportional to 911,894.73, 1,368,078.44 and 485,079.06

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Solution

The fourth proportional to 911,894.73, 1,368,078.44 and 485,079.06 is: 727,744.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,894.73 : 1,368,078.44 = 485,079.06 : x
  2. Step 2: Convert to fraction form
    911,894.73/1,368,078.44 = 485,079.06/x
  3. Step 3: Cross multiply
    911,894.73x = 1,368,078.44 × 485,079.06
  4. Step 4: Simplify right side
    911,894.73x = 663,626,201,256.07
  5. Step 5: Solve for x
    x = 663,626,201,256.07/911,894.73
  6. Step 6: Final answer
    x = 727,744.31

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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.