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Finding the Fourth Proportional to 275,115.40, 379,816.56 and 210,465.52

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Solution

The fourth proportional to 275,115.40, 379,816.56 and 210,465.52 is: 290,562.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,115.40 : 379,816.56 = 210,465.52 : x
  2. Step 2: Convert to fraction form
    275,115.40/379,816.56 = 210,465.52/x
  3. Step 3: Cross multiply
    275,115.40x = 379,816.56 × 210,465.52
  4. Step 4: Simplify right side
    275,115.40x = 79,938,289,805.01
  5. Step 5: Solve for x
    x = 79,938,289,805.01/275,115.40
  6. Step 6: Final answer
    x = 290,562.76

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1.5x scale

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.