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Finding the Fourth Proportional to 307,396.45, 424,206.28 and 171,430.56

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Solution

The fourth proportional to 307,396.45, 424,206.28 and 171,430.56 is: 236,573.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,396.45 : 424,206.28 = 171,430.56 : x
  2. Step 2: Convert to fraction form
    307,396.45/424,206.28 = 171,430.56/x
  3. Step 3: Cross multiply
    307,396.45x = 424,206.28 × 171,430.56
  4. Step 4: Simplify right side
    307,396.45x = 72,721,920,350.21
  5. Step 5: Solve for x
    x = 72,721,920,350.21/307,396.45
  6. Step 6: Final answer
    x = 236,573.71

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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.