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Finding the Fourth Proportional to 275,132.90, 385,448.50 and 275,132.90

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Solution

The fourth proportional to 275,132.90, 385,448.50 and 275,132.90 is: 385,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,132.90 : 385,448.50 = 275,132.90 : x
  2. Step 2: Convert to fraction form
    275,132.90/385,448.50 = 275,132.90/x
  3. Step 3: Cross multiply
    275,132.90x = 385,448.50 × 275,132.90
  4. Step 4: Simplify right side
    275,132.90x = 106,049,563,605.65
  5. Step 5: Solve for x
    x = 106,049,563,605.65/275,132.90
  6. Step 6: Final answer
    x = 385,448.50

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1.5x scale

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.