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Finding the Fourth Proportional to 307,995.15, 425,028.77 and 172,031.08

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Solution

The fourth proportional to 307,995.15, 425,028.77 and 172,031.08 is: 237,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,995.15 : 425,028.77 = 172,031.08 : x
  2. Step 2: Convert to fraction form
    307,995.15/425,028.77 = 172,031.08/x
  3. Step 3: Cross multiply
    307,995.15x = 425,028.77 × 172,031.08
  4. Step 4: Simplify right side
    307,995.15x = 73,118,157,701.68
  5. Step 5: Solve for x
    x = 73,118,157,701.68/307,995.15
  6. Step 6: Final answer
    x = 237,400.35

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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.