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Finding the Fourth Proportional to 271,490.28, 407,218.80 and 121,690.32

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Solution

The fourth proportional to 271,490.28, 407,218.80 and 121,690.32 is: 182,528.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,490.28 : 407,218.80 = 121,690.32 : x
  2. Step 2: Convert to fraction form
    271,490.28/407,218.80 = 121,690.32/x
  3. Step 3: Cross multiply
    271,490.28x = 407,218.80 × 121,690.32
  4. Step 4: Simplify right side
    271,490.28x = 49,554,586,082.02
  5. Step 5: Solve for x
    x = 49,554,586,082.02/271,490.28
  6. Step 6: Final answer
    x = 182,528.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.