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Finding the Fourth Proportional to 275,145.90, 385,904.10 and 275,145.90

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Solution

The fourth proportional to 275,145.90, 385,904.10 and 275,145.90 is: 385,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,145.90 : 385,904.10 = 275,145.90 : x
  2. Step 2: Convert to fraction form
    275,145.90/385,904.10 = 275,145.90/x
  3. Step 3: Cross multiply
    275,145.90x = 385,904.10 × 275,145.90
  4. Step 4: Simplify right side
    275,145.90x = 106,179,930,908.19
  5. Step 5: Solve for x
    x = 106,179,930,908.19/275,145.90
  6. Step 6: Final answer
    x = 385,904.10

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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.