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Finding the Fourth Proportional to 307,983.88, 425,013.26 and 172,019.77

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Solution

The fourth proportional to 307,983.88, 425,013.26 and 172,019.77 is: 237,384.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,983.88 : 425,013.26 = 172,019.77 : x
  2. Step 2: Convert to fraction form
    307,983.88/425,013.26 = 172,019.77/x
  3. Step 3: Cross multiply
    307,983.88x = 425,013.26 × 172,019.77
  4. Step 4: Simplify right side
    307,983.88x = 73,110,681,309.52
  5. Step 5: Solve for x
    x = 73,110,681,309.52/307,983.88
  6. Step 6: Final answer
    x = 237,384.77

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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.