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Finding the Fourth Proportional to 306,328.97, 422,720.92 and 168,499.15

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Solution

The fourth proportional to 306,328.97, 422,720.92 and 168,499.15 is: 232,521.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,328.97 : 422,720.92 = 168,499.15 : x
  2. Step 2: Convert to fraction form
    306,328.97/422,720.92 = 168,499.15/x
  3. Step 3: Cross multiply
    306,328.97x = 422,720.92 × 168,499.15
  4. Step 4: Simplify right side
    306,328.97x = 71,228,114,861.04
  5. Step 5: Solve for x
    x = 71,228,114,861.04/306,328.97
  6. Step 6: Final answer
    x = 232,521.64

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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.