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Finding the Fourth Proportional to 307,999.78, 425,035.18 and 172,035.63

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Solution

The fourth proportional to 307,999.78, 425,035.18 and 172,035.63 is: 237,406.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,999.78 : 425,035.18 = 172,035.63 : x
  2. Step 2: Convert to fraction form
    307,999.78/425,035.18 = 172,035.63/x
  3. Step 3: Cross multiply
    307,999.78x = 425,035.18 × 172,035.63
  4. Step 4: Simplify right side
    307,999.78x = 73,121,195,595.96
  5. Step 5: Solve for x
    x = 73,121,195,595.96/307,999.78
  6. Step 6: Final answer
    x = 237,406.65

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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.