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Finding the Fourth Proportional to 303,356.81, 418,631.89 and 167,390.64

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Solution

The fourth proportional to 303,356.81, 418,631.89 and 167,390.64 is: 230,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,356.81 : 418,631.89 = 167,390.64 : x
  2. Step 2: Convert to fraction form
    303,356.81/418,631.89 = 167,390.64/x
  3. Step 3: Cross multiply
    303,356.81x = 418,631.89 × 167,390.64
  4. Step 4: Simplify right side
    303,356.81x = 70,075,059,573.03
  5. Step 5: Solve for x
    x = 70,075,059,573.03/303,356.81
  6. Step 6: Final answer
    x = 230,998.81

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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.