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Finding the Fourth Proportional to 1,379,452.48, 1,903,644 and 775,840

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Solution

The fourth proportional to 1,379,452.48, 1,903,644 and 775,840 is: 1,070,658.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,452.48 : 1,903,644 = 775,840 : x
  2. Step 2: Convert to fraction form
    1,379,452.48/1,903,644 = 775,840/x
  3. Step 3: Cross multiply
    1,379,452.48x = 1,903,644 × 775,840
  4. Step 4: Simplify right side
    1,379,452.48x = 1,476,923,160,960
  5. Step 5: Solve for x
    x = 1,476,923,160,960/1,379,452.48
  6. Step 6: Final answer
    x = 1,070,658.96

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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.