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Finding the Fourth Proportional to 318,009.44, 438,390.72 and 222,218.72

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Solution

The fourth proportional to 318,009.44, 438,390.72 and 222,218.72 is: 306,338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,009.44 : 438,390.72 = 222,218.72 : x
  2. Step 2: Convert to fraction form
    318,009.44/438,390.72 = 222,218.72/x
  3. Step 3: Cross multiply
    318,009.44x = 438,390.72 × 222,218.72
  4. Step 4: Simplify right side
    318,009.44x = 97,418,624,658.28
  5. Step 5: Solve for x
    x = 97,418,624,658.28/318,009.44
  6. Step 6: Final answer
    x = 306,338.78

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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.