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Finding the Fourth Proportional to 1,379,477.72, 1,903,660.92 and 775,865.72

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Solution

The fourth proportional to 1,379,477.72, 1,903,660.92 and 775,865.72 is: 1,070,684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,477.72 : 1,903,660.92 = 775,865.72 : x
  2. Step 2: Convert to fraction form
    1,379,477.72/1,903,660.92 = 775,865.72/x
  3. Step 3: Cross multiply
    1,379,477.72x = 1,903,660.92 × 775,865.72
  4. Step 4: Simplify right side
    1,379,477.72x = 1,476,985,250,331.66
  5. Step 5: Solve for x
    x = 1,476,985,250,331.66/1,379,477.72
  6. Step 6: Final answer
    x = 1,070,684.38

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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.