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Finding the Fourth Proportional to 306,609.12, 423,120.48 and 172,473.12

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Solution

The fourth proportional to 306,609.12, 423,120.48 and 172,473.12 is: 238,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,609.12 : 423,120.48 = 172,473.12 : x
  2. Step 2: Convert to fraction form
    306,609.12/423,120.48 = 172,473.12/x
  3. Step 3: Cross multiply
    306,609.12x = 423,120.48 × 172,473.12
  4. Step 4: Simplify right side
    306,609.12x = 72,976,909,321.50
  5. Step 5: Solve for x
    x = 72,976,909,321.50/306,609.12
  6. Step 6: Final answer
    x = 238,012.85

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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.