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Finding the Fourth Proportional to 307,991.54, 425,019.69 and 172,021.50

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Solution

The fourth proportional to 307,991.54, 425,019.69 and 172,021.50 is: 237,384.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,991.54 : 425,019.69 = 172,021.50 : x
  2. Step 2: Convert to fraction form
    307,991.54/425,019.69 = 172,021.50/x
  3. Step 3: Cross multiply
    307,991.54x = 425,019.69 × 172,021.50
  4. Step 4: Simplify right side
    307,991.54x = 73,112,524,603.34
  5. Step 5: Solve for x
    x = 73,112,524,603.34/307,991.54
  6. Step 6: Final answer
    x = 237,384.85

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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.