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Finding the Fourth Proportional to 306,030.70, 422,320.75 and 168,212.80

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Solution

The fourth proportional to 306,030.70, 422,320.75 and 168,212.80 is: 232,132.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,030.70 : 422,320.75 = 168,212.80 : x
  2. Step 2: Convert to fraction form
    306,030.70/422,320.75 = 168,212.80/x
  3. Step 3: Cross multiply
    306,030.70x = 422,320.75 × 168,212.80
  4. Step 4: Simplify right side
    306,030.70x = 71,039,755,855.60
  5. Step 5: Solve for x
    x = 71,039,755,855.60/306,030.70
  6. Step 6: Final answer
    x = 232,132.78

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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.