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Finding the Fourth Proportional to 307,396.43, 424,206.23 and 171,430.52

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Solution

The fourth proportional to 307,396.43, 424,206.23 and 171,430.52 is: 236,573.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,396.43 : 424,206.23 = 171,430.52 : x
  2. Step 2: Convert to fraction form
    307,396.43/424,206.23 = 171,430.52/x
  3. Step 3: Cross multiply
    307,396.43x = 424,206.23 × 171,430.52
  4. Step 4: Simplify right side
    307,396.43x = 72,721,891,617.96
  5. Step 5: Solve for x
    x = 72,721,891,617.96/307,396.43
  6. Step 6: Final answer
    x = 236,573.64

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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.