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Finding the Fourth Proportional to 307,172.73, 423,900.45 and 171,215.43

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Solution

The fourth proportional to 307,172.73, 423,900.45 and 171,215.43 is: 236,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,172.73 : 423,900.45 = 171,215.43 : x
  2. Step 2: Convert to fraction form
    307,172.73/423,900.45 = 171,215.43/x
  3. Step 3: Cross multiply
    307,172.73x = 423,900.45 × 171,215.43
  4. Step 4: Simplify right side
    307,172.73x = 72,578,297,823.94
  5. Step 5: Solve for x
    x = 72,578,297,823.94/307,172.73
  6. Step 6: Final answer
    x = 236,278.45

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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.