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Finding the Fourth Proportional to 307,986.91, 425,013.18 and 172,016.87

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Solution

The fourth proportional to 307,986.91, 425,013.18 and 172,016.87 is: 237,378.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,986.91 : 425,013.18 = 172,016.87 : x
  2. Step 2: Convert to fraction form
    307,986.91/425,013.18 = 172,016.87/x
  3. Step 3: Cross multiply
    307,986.91x = 425,013.18 × 172,016.87
  4. Step 4: Simplify right side
    307,986.91x = 73,109,434,162.22
  5. Step 5: Solve for x
    x = 73,109,434,162.22/307,986.91
  6. Step 6: Final answer
    x = 237,378.38

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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.