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Finding the Fourth Proportional to 1,017,917.73, 1,405,271.79 and 784,835.55

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Solution

The fourth proportional to 1,017,917.73, 1,405,271.79 and 784,835.55 is: 1,083,493.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017,917.73 : 1,405,271.79 = 784,835.55 : x
  2. Step 2: Convert to fraction form
    1,017,917.73/1,405,271.79 = 784,835.55/x
  3. Step 3: Cross multiply
    1,017,917.73x = 1,405,271.79 × 784,835.55
  4. Step 4: Simplify right side
    1,017,917.73x = 1,102,907,258,204.13
  5. Step 5: Solve for x
    x = 1,102,907,258,204.13/1,017,917.73
  6. Step 6: Final answer
    x = 1,083,493.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.