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Finding the Fourth Proportional to 283,418.60, 391,145.29 and 211,674.06

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Solution

The fourth proportional to 283,418.60, 391,145.29 and 211,674.06 is: 292,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,418.60 : 391,145.29 = 211,674.06 : x
  2. Step 2: Convert to fraction form
    283,418.60/391,145.29 = 211,674.06/x
  3. Step 3: Cross multiply
    283,418.60x = 391,145.29 × 211,674.06
  4. Step 4: Simplify right side
    283,418.60x = 82,795,311,054.99
  5. Step 5: Solve for x
    x = 82,795,311,054.99/283,418.60
  6. Step 6: Final answer
    x = 292,130.84

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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.