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Finding the Fourth Proportional to 307,872.10, 424,859.40 and 171,908.32

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Solution

The fourth proportional to 307,872.10, 424,859.40 and 171,908.32 is: 237,231.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,872.10 : 424,859.40 = 171,908.32 : x
  2. Step 2: Convert to fraction form
    307,872.10/424,859.40 = 171,908.32/x
  3. Step 3: Cross multiply
    307,872.10x = 424,859.40 × 171,908.32
  4. Step 4: Simplify right side
    307,872.10x = 73,036,865,690.21
  5. Step 5: Solve for x
    x = 73,036,865,690.21/307,872.10
  6. Step 6: Final answer
    x = 237,231.19

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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.