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Finding the Fourth Proportional to 307,975.78, 425,003.79 and 170,154.51

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Solution

The fourth proportional to 307,975.78, 425,003.79 and 170,154.51 is: 234,811.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,975.78 : 425,003.79 = 170,154.51 : x
  2. Step 2: Convert to fraction form
    307,975.78/425,003.79 = 170,154.51/x
  3. Step 3: Cross multiply
    307,975.78x = 425,003.79 × 170,154.51
  4. Step 4: Simplify right side
    307,975.78x = 72,316,311,635.59
  5. Step 5: Solve for x
    x = 72,316,311,635.59/307,975.78
  6. Step 6: Final answer
    x = 234,811.68

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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.