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Finding the Fourth Proportional to 289,317.45, 405,977.55 and 289,317.45

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Solution

The fourth proportional to 289,317.45, 405,977.55 and 289,317.45 is: 405,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,317.45 : 405,977.55 = 289,317.45 : x
  2. Step 2: Convert to fraction form
    289,317.45/405,977.55 = 289,317.45/x
  3. Step 3: Cross multiply
    289,317.45x = 405,977.55 × 289,317.45
  4. Step 4: Simplify right side
    289,317.45x = 117,456,389,523.25
  5. Step 5: Solve for x
    x = 117,456,389,523.25/289,317.45
  6. Step 6: Final answer
    x = 405,977.55

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.