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Finding the Fourth Proportional to 275,688.45, 386,751.15 and 275,688.45

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Solution

The fourth proportional to 275,688.45, 386,751.15 and 275,688.45 is: 386,751.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,688.45 : 386,751.15 = 275,688.45 : x
  2. Step 2: Convert to fraction form
    275,688.45/386,751.15 = 275,688.45/x
  3. Step 3: Cross multiply
    275,688.45x = 386,751.15 × 275,688.45
  4. Step 4: Simplify right side
    275,688.45x = 106,622,825,079.22
  5. Step 5: Solve for x
    x = 106,622,825,079.22/275,688.45
  6. Step 6: Final answer
    x = 386,751.15

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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.