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Finding the Fourth Proportional to 306,668.86, 422,293.05 and 220,476.15

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Solution

The fourth proportional to 306,668.86, 422,293.05 and 220,476.15 is: 303,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,668.86 : 422,293.05 = 220,476.15 : x
  2. Step 2: Convert to fraction form
    306,668.86/422,293.05 = 220,476.15/x
  3. Step 3: Cross multiply
    306,668.86x = 422,293.05 × 220,476.15
  4. Step 4: Simplify right side
    306,668.86x = 93,105,545,835.76
  5. Step 5: Solve for x
    x = 93,105,545,835.76/306,668.86
  6. Step 6: Final answer
    x = 303,602.87

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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.