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Finding the Fourth Proportional to 306,879.64, 423,477.25 and 169,031.75

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Solution

The fourth proportional to 306,879.64, 423,477.25 and 169,031.75 is: 233,254.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,879.64 : 423,477.25 = 169,031.75 : x
  2. Step 2: Convert to fraction form
    306,879.64/423,477.25 = 169,031.75/x
  3. Step 3: Cross multiply
    306,879.64x = 423,477.25 × 169,031.75
  4. Step 4: Simplify right side
    306,879.64x = 71,581,098,112.72
  5. Step 5: Solve for x
    x = 71,581,098,112.72/306,879.64
  6. Step 6: Final answer
    x = 233,254.64

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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.